René's URL Explorer Experiment


Title: FAQ · microsoft/TypeScript Wiki · GitHub

Open Graph Title: FAQ

X Title: FAQ

Description: TypeScript is a superset of JavaScript that compiles to clean JavaScript output. - FAQ · microsoft/TypeScript Wiki

Open Graph Description: TypeScript is a superset of JavaScript that compiles to clean JavaScript output. - microsoft/TypeScript

X Description: TypeScript is a superset of JavaScript that compiles to clean JavaScript output. - microsoft/TypeScript

Opengraph URL: https://github.com/microsoft/TypeScript/wiki/FAQ

X: @github

direct link

Domain: patch-diff.githubusercontent.com

route-pattern/:user_id/:repository/wiki/:id(.:format)
route-controllerwiki
route-actionshow
fetch-noncev2:1e8f53fe-df2f-dc77-0f22-88f5f9cb92f7
current-catalog-service-hash27690012a2eb28b75d0bacab0f2c11870266e8db9e019fa71fea812b82397bd6
request-id90C0:2891C9:290E210:36FDD66:6992EFA2
html-safe-nonce940da78e85bf87df3dc7b21bda22ddd9b0547b4d94147bd4c0cb31e56d522413
visitor-payloadeyJyZWZlcnJlciI6IiIsInJlcXVlc3RfaWQiOiI5MEMwOjI4OTFDOToyOTBFMjEwOjM2RkRENjY6Njk5MkVGQTIiLCJ2aXNpdG9yX2lkIjoiMTgyODQ2NTE3NzI3NjUzNzk0IiwicmVnaW9uX2VkZ2UiOiJpYWQiLCJyZWdpb25fcmVuZGVyIjoiaWFkIn0=
visitor-hmac01f2c93d9e10e5655bd7d3a456e32aebb5654d9c91ca76a650133f794510e372
hovercard-subject-tagrepository:20929025
github-keyboard-shortcutsrepository,copilot
google-site-verificationApib7-x98H0j5cPqHWwSMm6dNU4GmODRoqxLiDzdx9I
octolytics-urlhttps://collector.github.com/github/collect
analytics-location///wiki/show
fb:app_id1401488693436528
apple-itunes-appapp-id=1477376905, app-argument=https://github.com/microsoft/TypeScript/wiki/FAQ
twitter:imagehttps://opengraph.githubassets.com/0db8898750764e4e615287d186b6f61574d9548252ee715d2176257faf092eb1/microsoft/TypeScript
twitter:cardsummary_large_image
og:imagehttps://opengraph.githubassets.com/0db8898750764e4e615287d186b6f61574d9548252ee715d2176257faf092eb1/microsoft/TypeScript
og:image:altTypeScript is a superset of JavaScript that compiles to clean JavaScript output. - microsoft/TypeScript
og:image:width1200
og:image:height600
og:site_nameGitHub
og:typeobject
hostnamegithub.com
expected-hostnamegithub.com
None01ab16879a3159e6f0717ab948b9b562e162a6aafd1f4393b786b07b747df244
turbo-cache-controlno-preview
go-importgithub.com/microsoft/TypeScript git https://github.com/microsoft/TypeScript.git
octolytics-dimension-user_id6154722
octolytics-dimension-user_loginmicrosoft
octolytics-dimension-repository_id20929025
octolytics-dimension-repository_nwomicrosoft/TypeScript
octolytics-dimension-repository_publictrue
octolytics-dimension-repository_is_forkfalse
octolytics-dimension-repository_network_root_id20929025
octolytics-dimension-repository_network_root_nwomicrosoft/TypeScript
turbo-body-classeslogged-out env-production page-responsive
disable-turbofalse
browser-stats-urlhttps://api.github.com/_private/browser/stats
browser-errors-urlhttps://api.github.com/_private/browser/errors
releaseb1570f3928bef80fa5fc7890ce0942e9b696ad9d
ui-targetfull
theme-color#1e2327
color-schemelight dark

Links:

Skip to contenthttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#start-of-content
https://patch-diff.githubusercontent.com/
Sign in https://patch-diff.githubusercontent.com/login?return_to=https%3A%2F%2Fgithub.com%2Fmicrosoft%2FTypeScript%2Fwiki%2FFAQ
GitHub CopilotWrite better code with AIhttps://github.com/features/copilot
GitHub SparkBuild and deploy intelligent appshttps://github.com/features/spark
GitHub ModelsManage and compare promptshttps://github.com/features/models
MCP RegistryNewIntegrate external toolshttps://github.com/mcp
ActionsAutomate any workflowhttps://github.com/features/actions
CodespacesInstant dev environmentshttps://github.com/features/codespaces
IssuesPlan and track workhttps://github.com/features/issues
Code ReviewManage code changeshttps://github.com/features/code-review
GitHub Advanced SecurityFind and fix vulnerabilitieshttps://github.com/security/advanced-security
Code securitySecure your code as you buildhttps://github.com/security/advanced-security/code-security
Secret protectionStop leaks before they starthttps://github.com/security/advanced-security/secret-protection
Why GitHubhttps://github.com/why-github
Documentationhttps://docs.github.com
Bloghttps://github.blog
Changeloghttps://github.blog/changelog
Marketplacehttps://github.com/marketplace
View all featureshttps://github.com/features
Enterpriseshttps://github.com/enterprise
Small and medium teamshttps://github.com/team
Startupshttps://github.com/enterprise/startups
Nonprofitshttps://github.com/solutions/industry/nonprofits
App Modernizationhttps://github.com/solutions/use-case/app-modernization
DevSecOpshttps://github.com/solutions/use-case/devsecops
DevOpshttps://github.com/solutions/use-case/devops
CI/CDhttps://github.com/solutions/use-case/ci-cd
View all use caseshttps://github.com/solutions/use-case
Healthcarehttps://github.com/solutions/industry/healthcare
Financial serviceshttps://github.com/solutions/industry/financial-services
Manufacturinghttps://github.com/solutions/industry/manufacturing
Governmenthttps://github.com/solutions/industry/government
View all industrieshttps://github.com/solutions/industry
View all solutionshttps://github.com/solutions
AIhttps://github.com/resources/articles?topic=ai
Software Developmenthttps://github.com/resources/articles?topic=software-development
DevOpshttps://github.com/resources/articles?topic=devops
Securityhttps://github.com/resources/articles?topic=security
View all topicshttps://github.com/resources/articles
Customer storieshttps://github.com/customer-stories
Events & webinarshttps://github.com/resources/events
Ebooks & reportshttps://github.com/resources/whitepapers
Business insightshttps://github.com/solutions/executive-insights
GitHub Skillshttps://skills.github.com
Documentationhttps://docs.github.com
Customer supporthttps://support.github.com
Community forumhttps://github.com/orgs/community/discussions
Trust centerhttps://github.com/trust-center
Partnershttps://github.com/partners
GitHub SponsorsFund open source developershttps://github.com/sponsors
Security Labhttps://securitylab.github.com
Maintainer Communityhttps://maintainers.github.com
Acceleratorhttps://github.com/accelerator
Archive Programhttps://archiveprogram.github.com
Topicshttps://github.com/topics
Trendinghttps://github.com/trending
Collectionshttps://github.com/collections
Enterprise platformAI-powered developer platformhttps://github.com/enterprise
GitHub Advanced SecurityEnterprise-grade security featureshttps://github.com/security/advanced-security
Copilot for BusinessEnterprise-grade AI featureshttps://github.com/features/copilot/copilot-business
Premium SupportEnterprise-grade 24/7 supporthttps://github.com/premium-support
Pricinghttps://github.com/pricing
Search syntax tipshttps://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax
documentationhttps://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax
Sign in https://patch-diff.githubusercontent.com/login?return_to=https%3A%2F%2Fgithub.com%2Fmicrosoft%2FTypeScript%2Fwiki%2FFAQ
Sign up https://patch-diff.githubusercontent.com/signup?ref_cta=Sign+up&ref_loc=header+logged+out&ref_page=%2F%3Cuser-name%3E%2F%3Crepo-name%3E%2Fwiki%2Fshow&source=header-repo&source_repo=microsoft%2FTypeScript
Reloadhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Reloadhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Reloadhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
microsoft https://patch-diff.githubusercontent.com/microsoft
TypeScripthttps://patch-diff.githubusercontent.com/microsoft/TypeScript
Notifications https://patch-diff.githubusercontent.com/login?return_to=%2Fmicrosoft%2FTypeScript
Fork 13.2k https://patch-diff.githubusercontent.com/login?return_to=%2Fmicrosoft%2FTypeScript
Star 108k https://patch-diff.githubusercontent.com/login?return_to=%2Fmicrosoft%2FTypeScript
Code https://patch-diff.githubusercontent.com/microsoft/TypeScript
Issues 5k https://patch-diff.githubusercontent.com/microsoft/TypeScript/issues
Pull requests 497 https://patch-diff.githubusercontent.com/microsoft/TypeScript/pulls
Actions https://patch-diff.githubusercontent.com/microsoft/TypeScript/actions
Projects 1 https://patch-diff.githubusercontent.com/microsoft/TypeScript/projects
Models https://patch-diff.githubusercontent.com/microsoft/TypeScript/models
Wiki https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki
Security 0 https://patch-diff.githubusercontent.com/microsoft/TypeScript/security
Insights https://patch-diff.githubusercontent.com/microsoft/TypeScript/pulse
Code https://patch-diff.githubusercontent.com/microsoft/TypeScript
Issues https://patch-diff.githubusercontent.com/microsoft/TypeScript/issues
Pull requests https://patch-diff.githubusercontent.com/microsoft/TypeScript/pulls
Actions https://patch-diff.githubusercontent.com/microsoft/TypeScript/actions
Projects https://patch-diff.githubusercontent.com/microsoft/TypeScript/projects
Models https://patch-diff.githubusercontent.com/microsoft/TypeScript/models
Wiki https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki
Security https://patch-diff.githubusercontent.com/microsoft/TypeScript/security
Insights https://patch-diff.githubusercontent.com/microsoft/TypeScript/pulse
Jump to bottomhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#wiki-pages-box
109 revisionshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ/_history
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#faq-for-issue-filers
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#common-feature-requests
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#existing-common-requests
#202https://github.com/microsoft/TypeScript/issues/202
#4196https://github.com/microsoft/TypeScript/issues/4196
#12936https://github.com/microsoft/TypeScript/issues/12936
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#behavior-that-looks-wrong-and-arguably-is-but-is-currently-working-as-intended
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#pre-declined-feature-requests
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#new-utility-types
Experience has taught ushttps://github.com/microsoft/TypeScript/issues/30825
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#add-a-key-constraint-to-omit
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#module-specifier-rewriting
rewriteRelativeImportExtensionshttps://www.typescriptlang.org/tsconfig/#rewriteRelativeImportExtensions
Module documentationhttps://www.typescriptlang.org/docs/handbook/modules/theory.html#module-specifiers-are-not-transformed
This commenthttps://github.com/microsoft/TypeScript/issues/49083#issuecomment-1435399267
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#additional-logic-in-nouncheckedindexedaccess
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#throws--checked-exceptions--typed-exceptions
See this commenthttps://github.com/microsoft/TypeScript/issues/13219#issuecomment-1515037604
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#common-misconceptions
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#comment-emit-is-best-effort
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#primitives-are---and---doesnt-mean-object
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#--does-not-refer-to-objects-with-no-properties
lint ruleshttps://github.com/typescript-eslint/typescript-eslint/issues/8700
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#evolving-let-and-evolving-arrays-arent-any
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#indirect-excess-properties-are-ok
this StackOverflow posthttps://stackoverflow.com/questions/55012174/why-doesnt-object-keys-return-a-keyof-type-in-typescript
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#numberisfinite-and-numberisnan-are-typed-correctly
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#parameter-contravariance-is-correct
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#parameter-arity-variance-is-correct
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#void-and-undefined-are-different
this StackOverflow answerhttps://stackoverflow.com/a/58885486
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#exclude-isnt-type-negation
As mentioned in the documentationhttps://www.typescriptlang.org/docs/handbook/utility-types.html#excludeuniontype-excludedmembers
distributivityhttps://www.typescriptlang.org/docs/handbook/2/conditional-types.html#distributive-conditional-types
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#as-is-the-casting-operator-so-it-casts
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#the-ecmascript-spec-is-descriptive-not-normative
this Stackoverflow Posthttps://stackoverflow.com/a/41750391/
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#exclude-in-tsconfigjson-only-filters-include
As mentioned in the docshttps://www.typescriptlang.org/tsconfig#exclude
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#the-lib-in-skiplibcheck-refers-to-dts-files
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#non-invariants
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#circularity-errors-may-occur-in-the-presence-of-circularities
#45213https://github.com/microsoft/TypeScript/issues/45213
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#comment-preservation-not-guaranteed
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#structural-vs-instantiation-based-inference
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#turn-on-this-flag-to-do-that
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#auto-import-heuristics-and-preferences
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#assume-array-access-might-be-out-of-bounds-nouncheckedindexedaccess
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#require-properties-to-either-be-missing-or-not-undefined-exactoptionalpropertytypes
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#enforce-readonly-in-subtyping--assignability
#58296https://github.com/microsoft/TypeScript/pull/58296
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#common-comments
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#what-kind-of-feedback-are-you-looking-for
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#time-marches-on
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#can-i-work-on-this
https://github.com/microsoft/TypeScript/blob/main/CONTRIBUTING.md#issue-claiminghttps://github.com/microsoft/TypeScript/blob/main/CONTRIBUTING.md#issue-claiming
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#any-updates
iteration planshttps://github.com/microsoft/TypeScript/labels/Planning
meeting noteshttps://github.com/microsoft/TypeScript/labels/Design%20Notes
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#this-is-closed-but-should-be-open-or-vice-versa
hard to find definitions that everyone agrees withhttps://danluu.com/impossible-agree/
code of conducthttps://microsoft.github.io/codeofconduct/
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#other-faqs-and-errors
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-method-bivariance
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#what-does-error-ts1287-mean
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#the-inferred-type-of-x-cannot-be-named-without-a-reference-to-y-this-is-likely-not-portable-a-type-annotation-is-necessary
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#faq-archive
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#common-bugs-that-arent-bugs
FAQ Entry on this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-do-these-empty-classes-behave-strangely
FAQ Entry on this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-are-functions-returning-non-void-assignable-to-function-returning-void
FAQ Entry on this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-are-functions-with-fewer-parameters-assignable-to-functions-that-take-more-parameters
FAQ Entry on this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#you-should-emit-classes-like-this-so-they-have-real-private-members
issuehttps://github.com/microsoft/TypeScript/issues/31751
herehttps://github.com/microsoft/TypeScript/pull/18654
node documentationhttps://nodejs.org/api/esm.html#commonjs-namespaces
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#common-feature-requests-1
#16https://github.com/Microsoft/TypeScript/issues/16
#8https://github.com/Microsoft/TypeScript/issues/8
#9https://github.com/Microsoft/TypeScript/issues/9
#563https://github.com/Microsoft/TypeScript/issues/563
#513https://github.com/Microsoft/TypeScript/issues/513
#212https://github.com/Microsoft/TypeScript/issues/212
#3442https://github.com/Microsoft/TypeScript/issues/3442
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#type-system-behavior
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#what-is-structural-typing
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#what-is-type-erasure
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-are-function-parameters-bivariant
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-are-functions-with-fewer-parameters-assignable-to-functions-that-take-more-parameters
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-are-functions-returning-non-void-assignable-to-function-returning-void
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-are-all-types-assignable-to-empty-interfaces
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#can-i-make-a-type-alias-nominal
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#how-do-i-prevent-two-types-from-being-structurally-compatible
#202https://github.com/Microsoft/TypeScript/issues/202
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#how-do-i-check-at-run-time-if-an-object-implements-some-interface
https://en.wikipedia.org/wiki/Type_erasurehttps://en.wikipedia.org/wiki/Type_erasure
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-doesnt-this-incorrect-cast-throw-a-runtime-error
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-dont-i-get-type-checking-for-number--string-or-t--t
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-am-i-getting-an-error-about-a-missing-index-signature
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-am-i-getting-supplied-parameters-do-not-match-any-signature-error
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#classes
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-do-these-empty-classes-behave-strangely
"Why are all types assignable to empty interfaces?"https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-are-all-types-assignable-to-empty-interfaces
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#when-and-why-are-classes-nominal
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-does-this-get-orphaned-in-my-instance-methods
http://stackoverflow.com/a/20627988/1704166http://stackoverflow.com/a/20627988/1704166
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#whats-the-difference-between-bar-and-typeof-bar-when-bar-is-a-class
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-do-my-derived-class-property-initializers-overwrite-values-set-in-the-base-class-constructor
#1617https://github.com/Microsoft/TypeScript/issues/1617
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#whats-the-difference-between-declare-class-and-interface
http://stackoverflow.com/a/14348084/1704166http://stackoverflow.com/a/14348084/1704166
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#what-does-it-mean-for-an-interface-to-extend-a-class
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-am-i-getting-typeerror-base-class-name-is-not-defined-in-__extends
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-am-i-getting-typeerror-cannot-read-property-prototype-of-undefined-in-__extends
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-doesnt-extending-built-ins-like-error-array-and-map-work
Object.setPrototypeOfhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/setPrototypeOf
__proto__https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/proto
these workarounds will not work on Internet Explorer 10 and priorhttps://msdn.microsoft.com/en-us/library/s4esdbwz(v=vs.94).aspx
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#generics
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-is-astring-assignable-to-anumber-for-interface-at--
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-doesnt-type-inference-work-on-this-interface-interface-foot--
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-cant-i-write-typeof-t-new-t-or-instanceof-t-in-my-generic-function
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#commandline-behavior
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-did-adding-an-import-or-export-modifier-break-my-program
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#what-does-the-error-exported-variable-name-has-or-is-using-private-name-name-mean
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#tsconfigjson-behavior
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#how-can-i-specify-an-include
#1927https://github.com/Microsoft/TypeScript/issues/1927
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-am-i-getting-the-error-ts5055-cannot-write-file-xxxjs-because-it-would-overwrite-input-file-when-using-javascript-files
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#glossary-and-terms-in-this-faq
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#dogs-cats-and-animals-oh-my
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#substitutability
Substitutabilityhttps://en.wikipedia.org/wiki/Liskov_substitution_principle
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#trailing-leading-and-detached-comments
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#dead-links-parking-lot
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-is-a-file-in-the-exclude-list-still-picked-up-by-the-compiler
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#want-to-contribute-to-this-wiki
Fork it and send a pull request.https://github.com/Microsoft/TypeScript-wiki
Home https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
'this' in TypeScript https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/'this'-in-TypeScript
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
All The Bots https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/All-The-Bots
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
API Breaking Changes https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/API-Breaking-Changes
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Architectural Overview https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Architectural-Overview
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Blog Post Ideas https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Blog-Post-Ideas
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Breaking Changes https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Breaking-Changes
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Cancellation Support in tsserver https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Cancellation-Support-in-tsserver
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Codebase Compiler Binder https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Codebase-Compiler-Binder
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Codebase Compiler Checker https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Codebase-Compiler-Checker
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Codebase Compiler Emitter https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Codebase-Compiler-Emitter
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Codebase Compiler FAQ https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Codebase-Compiler-FAQ
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Codebase Compiler Parser https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Codebase-Compiler-Parser
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Codebase Compiler Scanner https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Codebase-Compiler-Scanner
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Codebase Compiler Services https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Codebase-Compiler-Services
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Codebase Compiler Types https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Codebase-Compiler-Types
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Codebase Compiler Utils https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Codebase-Compiler-Utils
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Codebase Services Completions https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Codebase-Services-Completions
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Codebase Services TextChanges https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Codebase-Services-TextChanges
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Coding guidelines https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Coding-guidelines
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Common Errors https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Common-Errors
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Compiler Internals https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Compiler-Internals
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Compiler Options https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Compiler-Options
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Configuring MSBuild projects to use NuGet https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Configuring-MSBuild-projects-to-use-NuGet
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Contributing to TypeScript https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Contributing-to-TypeScript
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Debugging Language Service in VS Code https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Debugging-Language-Service-in-VS-Code
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Docker Quickstart https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Docker-Quickstart
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
FAQ https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
FAQ (For Issue Filers)https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#faq-for-issue-filers
Common Feature Requestshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#common-feature-requests
Existing Common Requestshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#existing-common-requests
Behavior That Looks Wrong (And Arguably Is) But Is Currently Working As Intendedhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#behavior-that-looks-wrong-and-arguably-is-but-is-currently-working-as-intended
Pre-Declined Feature Requestshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#pre-declined-feature-requests
New Utility Typeshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#new-utility-types
Add a Key Constraint to Omithttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#add-a-key-constraint-to-omit
Module Specifier Rewritinghttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#module-specifier-rewriting
Additional Logic in noUncheckedIndexedAccesshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#additional-logic-in-nouncheckedindexedaccess
throws / Checked Exceptions / Typed Exceptionshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#throws--checked-exceptions--typed-exceptions
Common Misconceptionshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#common-misconceptions
Comment Emit is Best-Efforthttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#comment-emit-is-best-effort
Primitives are { }, and { } Doesn't Mean objecthttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#primitives-are---and---doesnt-mean-object
{ } Does Not Refer to Objects With No Propertieshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#--does-not-refer-to-objects-with-no-properties
Evolving let and Evolving Arrays Aren't anyhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#evolving-let-and-evolving-arrays-arent-any
(Indirect) Excess Properties Are OKhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#indirect-excess-properties-are-ok
Number.isFinite and Number.isNaN are Typed Correctlyhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#numberisfinite-and-numberisnan-are-typed-correctly
Parameter Contravariance is Correcthttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#parameter-contravariance-is-correct
Parameter Arity Variance is Correcthttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#parameter-arity-variance-is-correct
void and undefined are Differenthttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#void-and-undefined-are-different
Exclude Isn't Type Negationhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#exclude-isnt-type-negation
as is the Casting Operator, So it Castshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#as-is-the-casting-operator-so-it-casts
The ECMAScript Spec is Descriptive, not Normativehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#the-ecmascript-spec-is-descriptive-not-normative
exclude in tsconfig.json Only Filters includehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#exclude-in-tsconfigjson-only-filters-include
The "lib" in skipLibCheck Refers To .d.ts Fileshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#the-lib-in-skiplibcheck-refers-to-dts-files
Non-Invariantshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#non-invariants
Circularity Errors May Occur In The Presence of Circularitieshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#circularity-errors-may-occur-in-the-presence-of-circularities
Comment Preservation Not Guaranteedhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#comment-preservation-not-guaranteed
Structural vs Instantiation-Based Inferencehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#structural-vs-instantiation-based-inference
Turn On This Flag To Do Thathttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#turn-on-this-flag-to-do-that
Auto-import Heuristics and Preferenceshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#auto-import-heuristics-and-preferences
Assume Array Access Might Be Out of Bounds: noUncheckedIndexedAccesshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#assume-array-access-might-be-out-of-bounds-nouncheckedindexedaccess
Require Properties to Either Be Missing or Not undefined: exactOptionalPropertyTypeshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#require-properties-to-either-be-missing-or-not-undefined-exactoptionalpropertytypes
Enforce readonly in Subtyping / Assignabilityhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#enforce-readonly-in-subtyping--assignability
Common Commentshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#common-comments
What Kind of Feedback Are You Looking For?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#what-kind-of-feedback-are-you-looking-for
Time Marches Onhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#time-marches-on
Can I Work On This?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#can-i-work-on-this
Any Updates?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#any-updates
This Is Closed, But Should Be Open, Or Vice Versahttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#this-is-closed-but-should-be-open-or-vice-versa
Other FAQs and Errorshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#other-faqs-and-errors
Why Method Bivariance?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-method-bivariance
What does error TS1287 mean?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#what-does-error-ts1287-mean
The inferred type of "X" cannot be named without a reference to "Y". This is likely not portable. A type annotation is necessaryhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#the-inferred-type-of-x-cannot-be-named-without-a-reference-to-y-this-is-likely-not-portable-a-type-annotation-is-necessary
FAQ Archivehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#faq-archive
Common "Bugs" That Aren't Bugshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#common-bugs-that-arent-bugs
Common Feature Requestshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#common-feature-requests-1
Type System Behaviorhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#type-system-behavior
What is structural typing?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#what-is-structural-typing
What is type erasure?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#what-is-type-erasure
Why are function parameters bivariant?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-are-function-parameters-bivariant
Why are functions with fewer parameters assignable to functions that take more parameters?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-are-functions-with-fewer-parameters-assignable-to-functions-that-take-more-parameters
Why are functions returning non-void assignable to function returning void?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-are-functions-returning-non-void-assignable-to-function-returning-void
Why are all types assignable to empty interfaces?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-are-all-types-assignable-to-empty-interfaces
Can I make a type alias nominal?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#can-i-make-a-type-alias-nominal
How do I prevent two types from being structurally compatible?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#how-do-i-prevent-two-types-from-being-structurally-compatible
How do I check at run-time if an object implements some interface?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#how-do-i-check-at-run-time-if-an-object-implements-some-interface
Why doesn't this incorrect cast throw a runtime error?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-doesnt-this-incorrect-cast-throw-a-runtime-error
Why don't I get type checking for (number) => string or (T) => T?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-dont-i-get-type-checking-for-number--string-or-t--t
Why am I getting an error about a missing index signature?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-am-i-getting-an-error-about-a-missing-index-signature
Why am I getting Supplied parameters do not match any signature error?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-am-i-getting-supplied-parameters-do-not-match-any-signature-error
Classeshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#classes
Why do these empty classes behave strangely?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-do-these-empty-classes-behave-strangely
When and why are classes nominal?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#when-and-why-are-classes-nominal
Why does this get orphaned in my instance methods?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-does-this-get-orphaned-in-my-instance-methods
What's the difference between Bar and typeof Bar when Bar is a class?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#whats-the-difference-between-bar-and-typeof-bar-when-bar-is-a-class
Why do my derived class property initializers overwrite values set in the base class constructor?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-do-my-derived-class-property-initializers-overwrite-values-set-in-the-base-class-constructor
What's the difference between declare class and interface?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#whats-the-difference-between-declare-class-and-interface
What does it mean for an interface to extend a class?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#what-does-it-mean-for-an-interface-to-extend-a-class
Why am I getting "TypeError: [base class name] is not defined in __extends?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-am-i-getting-typeerror-base-class-name-is-not-defined-in-__extends
Why am I getting "TypeError: Cannot read property 'prototype' of undefined" in __extends?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-am-i-getting-typeerror-cannot-read-property-prototype-of-undefined-in-__extends
Why doesn't extending built-ins like Error, Array, and Map work?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-doesnt-extending-built-ins-like-error-array-and-map-work
Genericshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#generics
Why is A assignable to A for interface A { }?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-is-astring-assignable-to-anumber-for-interface-at--
Why doesn't type inference work on this interface: interface Foo { }?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-doesnt-type-inference-work-on-this-interface-interface-foot--
Why can't I write typeof T, new T, or instanceof T in my generic function?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-cant-i-write-typeof-t-new-t-or-instanceof-t-in-my-generic-function
Commandline Behaviorhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#commandline-behavior
Why did adding an import or export modifier break my program?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-did-adding-an-import-or-export-modifier-break-my-program
What does the error "Exported variable [name] has or is using private name [name]" mean?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#what-does-the-error-exported-variable-name-has-or-is-using-private-name-name-mean
tsconfig.json Behaviorhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#tsconfigjson-behavior
How can I specify an include?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#how-can-i-specify-an-include
Why am I getting the error TS5055: Cannot write file 'xxx.js' because it would overwrite input file. when using JavaScript files?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-am-i-getting-the-error-ts5055-cannot-write-file-xxxjs-because-it-would-overwrite-input-file-when-using-javascript-files
Glossary and Terms in this FAQhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#glossary-and-terms-in-this-faq
Dogs, Cats, and Animals, Oh Myhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#dogs-cats-and-animals-oh-my
"Substitutability"https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#substitutability
Trailing, leading, and detached commentshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#trailing-leading-and-detached-comments
Dead Links Parking Lothttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#dead-links-parking-lot
Why is a file in the exclude list still picked up by the compiler?https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#why-is-a-file-in-the-exclude-list-still-picked-up-by-the-compiler
FAQs for API Consumers https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQs-for-API-Consumers
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Getting logs from TS Server in VS Code https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Getting-logs-from-TS-Server-in-VS-Code
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
How the User Tests Work https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/How-the-User-Tests-Work
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
How to maintain Definitely Typed tests https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/How-to-maintain-Definitely-Typed-tests
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
input https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/input
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Integrating with Build Tools https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Integrating-with-Build-Tools
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
JavaScript Language Service in Visual Studio https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/JavaScript-Language-Service-in-Visual-Studio
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
JSDoc support in JavaScript https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/JSDoc-support-in-JavaScript
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
JSX https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/JSX
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Nightly drops https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Nightly-drops
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
No New Utility Types https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/No-New-Utility-Types
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Node Target Mapping https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Node-Target-Mapping
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Performance https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Performance
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Performance Tracing https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Performance-Tracing
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Preferred Issue Titles https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Preferred-Issue-Titles
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Providing Visual Studio Repro Steps https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Providing-Visual-Studio-Repro-Steps
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
README https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/README
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
README https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/README
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Reference Checker Inference https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Reference-Checker-Inference
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Reference Checker Widening Narrowing https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Reference-Checker-Widening-Narrowing
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Release Activities https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Release-Activities
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Resources https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Resources
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Roadmap https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Roadmap
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
SECURITY https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/SECURITY
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Setting Compiler Options in MSBuild projects https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Setting-Compiler-Options-in-MSBuild-projects
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Spec conformance testing https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Spec-conformance-testing
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Standalone Server (tsserver) https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Standalone-Server-(tsserver)
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
test https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/test
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Tooling On The Compiler Repo https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Tooling-On-The-Compiler-Repo
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Triage Instructions https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Triage-Instructions
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Triggering TypeScript Bot https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Triggering-TypeScript-Bot
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
tsconfig.json https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/tsconfig.json
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Type Checking JavaScript Files https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Type-Checking-JavaScript-Files
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
TypeScript Deployment https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/TypeScript-Deployment
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
TypeScript Design Goals https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/TypeScript-Design-Goals
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
TypeScript Editor Support https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/TypeScript-Editor-Support
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
TypeScript MSBuild In Depth https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/TypeScript-MSBuild-In-Depth
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
TypeScript's Release Process https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/TypeScript's-Release-Process
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Typings for npm packages https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Typings-for-npm-packages
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Updating TypeScript in Visual Studio 2017 https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Updating-TypeScript-in-Visual-Studio-2017
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Useful Links for TypeScript Issue Management https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Useful-Links-for-TypeScript-Issue-Management
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Using the Compiler API https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Using-the-Compiler-API
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Using the Compiler API (TypeScript 1.4) https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Using-the-Compiler-API-(TypeScript-1.4)
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Using the Language Service API https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Using-the-Language-Service-API
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Using the New Language Service in Visual Studio 15 Preview https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Using-the-New-Language-Service-in-Visual-Studio-15-Preview
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Using TypeScript With ASP.NET 5 https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Using-TypeScript-With-ASP.NET-5
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
What's new in TypeScript https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/What's-new-in-TypeScript
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Writing a Language Service Plugin https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Writing-a-Language-Service-Plugin
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
Writing Good Design Proposals https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Writing-Good-Design-Proposals
Please reload this pagehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
User documentationhttps://www.typescriptlang.org/
https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ#user-documentation
Roadmaphttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Roadmap
Breaking Changeshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Breaking-Changes
API Breaking Changeshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/API-Breaking-Changes
Performancehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Performance
Performance-Tracinghttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Performance-Tracing
Debugging-Language-Service-in-VS-Codehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Debugging-Language-Service-in-VS-Code
Getting-logs-from-TS-Server-in-VS-Codehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Getting-logs-from-TS-Server-in-VS-Code
JavaScript-Language-Service-in-Visual-Studiohttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/JavaScript-Language-Service-in-Visual-Studio
Providing-Visual-Studio-Repro-Stepshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Providing-Visual-Studio-Repro-Steps
Contributing to TypeScripthttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Contributing-to-TypeScript
TypeScript Design Goalshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/TypeScript-Design-Goals
Coding Guidelineshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Coding-guidelines
Useful Links for TypeScript Issue Managementhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Useful-Links-for-TypeScript-Issue-Management
Writing Good Design Proposalshttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Writing-Good-Design-Proposals
Compiler Repo Noteshttps://github.com/microsoft/TypeScript-Compiler-Notes/
Deploymenthttps://github.com/microsoft/TypeScript/wiki/TypeScript-Deployment
Architectural Overviewhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Architectural-Overview
Using the Compiler APIhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Using-the-Compiler-API
Using the Language Service APIhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Using-the-Language-Service-API
Standalone Server (tsserver)https://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Standalone-Server-%28tsserver%29
TypeScript MSBuild In Depthhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/TypeScript-MSBuild-In-Depth
Debugging Language Service in VS Codehttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Debugging-Language-Service-in-VS-Code
Writing a Language Service Pluginhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Writing-a-Language-Service-Plugin
Docker Quickstarthttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Docker-Quickstart
FAQhttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQ
FAQs for API Consumershttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/FAQs-for-API-Consumers
Triggering TypeScript Bothttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Triggering-TypeScript-Bot
Tooling on the Compiler Repohttps://patch-diff.githubusercontent.com/microsoft/TypeScript/wiki/Tooling-On-The-Compiler-Repo
https://github.com
Termshttps://docs.github.com/site-policy/github-terms/github-terms-of-service
Privacyhttps://docs.github.com/site-policy/privacy-policies/github-privacy-statement
Securityhttps://github.com/security
Statushttps://www.githubstatus.com/
Communityhttps://github.community/
Docshttps://docs.github.com/
Contacthttps://support.github.com?tags=dotcom-footer

Viewport: width=device-width

URLs of crawlers that visited me.