René's URL Explorer Experiment


Title: 1.1 An Introduction to JavaScript · Bunlong/The-Modern-JavaScript-Tutorial Wiki · GitHub

Open Graph Title: 1.1 An Introduction to JavaScript

X Title: 1.1 An Introduction to JavaScript

Description: Let learn JavaScript, starting from scratch and go on to advanced concepts. - 1.1 An Introduction to JavaScript · Bunlong/The-Modern-JavaScript-Tutorial Wiki

Open Graph Description: Let learn JavaScript, starting from scratch and go on to advanced concepts. - Bunlong/The-Modern-JavaScript-Tutorial

X Description: Let learn JavaScript, starting from scratch and go on to advanced concepts. - Bunlong/The-Modern-JavaScript-Tutorial

Opengraph URL: https://github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript

X: @github

direct link

Domain: Github.com

route-pattern/:user_id/:repository/wiki/:id(.:format)
route-controllerwiki
route-actionshow
fetch-noncev2:a7826d56-a5e4-25d1-7e32-77791abbb641
current-catalog-service-hash27690012a2eb28b75d0bacab0f2c11870266e8db9e019fa71fea812b82397bd6
request-idD74E:18163C:1436C1:1D00B9:6A636372
html-safe-nonce3b629a5fb9672823488348fa74b1d39db6f61c1fee5da213a28df4f6fb610a5c
visitor-payloadeyJyZWZlcnJlciI6IiIsInJlcXVlc3RfaWQiOiJENzRFOjE4MTYzQzoxNDM2QzE6MUQwMEI5OjZBNjM2MzcyIiwidmlzaXRvcl9pZCI6IjUyNDA3NzA4ODA3ODQ3ODYyOTAiLCJyZWdpb25fZWRnZSI6ImlhZCIsInJlZ2lvbl9yZW5kZXIiOiJpYWQifQ==
visitor-hmac9d85f1498ca486a4c31aa27fad963bf2b284b377ebbb694dca4f30b09cf184d3
hovercard-subject-tagrepository:121485542
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/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
twitter:imagehttps://opengraph.githubassets.com/6169ca23323e15d2d079bb5b661e3ef73ef61cde4b894515c3b2cfeb1fee53f8/Bunlong/The-Modern-JavaScript-Tutorial
twitter:cardsummary_large_image
og:imagehttps://opengraph.githubassets.com/6169ca23323e15d2d079bb5b661e3ef73ef61cde4b894515c3b2cfeb1fee53f8/Bunlong/The-Modern-JavaScript-Tutorial
og:image:altLet learn JavaScript, starting from scratch and go on to advanced concepts. - Bunlong/The-Modern-JavaScript-Tutorial
og:image:width1200
og:image:height600
og:site_nameGitHub
og:typeobject
hostnamegithub.com
expected-hostnamegithub.com
None669d3fcd704a169521d2b6431762f95a6878a9e8ccaf0fd5f2d0802fc5b971f9
turbo-cache-controlno-preview
go-importgithub.com/Bunlong/The-Modern-JavaScript-Tutorial git https://github.com/Bunlong/The-Modern-JavaScript-Tutorial.git
octolytics-dimension-user_id1308397
octolytics-dimension-user_loginBunlong
octolytics-dimension-repository_id121485542
octolytics-dimension-repository_nwoBunlong/The-Modern-JavaScript-Tutorial
octolytics-dimension-repository_publictrue
octolytics-dimension-repository_is_forkfalse
octolytics-dimension-repository_network_root_id121485542
octolytics-dimension-repository_network_root_nwoBunlong/The-Modern-JavaScript-Tutorial
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
release20da292f132ff51328be50073854259f417052c1
ui-targetfull
theme-color#1e2327
color-schemelight dark

Links:

Skip to contenthttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#start-of-content
https://Github.com/
Sign in https://Github.com/login?return_to=https%3A%2F%2Fgithub.com%2FBunlong%2FThe-Modern-JavaScript-Tutorial%2Fwiki%2F1.1-An-Introduction-to-JavaScript
GitHub CopilotWrite better code with AIhttps://github.com/features/copilot
GitHub Copilot appDirect agents from issue to mergehttps://github.com/features/ai/github-app
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
Code QualityEnforce quality at mergehttps://github.com/features/code-quality
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
View all resourceshttps://github.com/resources
GitHub SponsorsFund open source developershttps://github.com/open-source/sponsors
Security Labhttps://securitylab.github.com
Maintainer Communityhttps://maintainers.github.com
Acceleratorhttps://github.com/open-source/accelerator
GitHub Starshttps://stars.github.com
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/enterprise/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://Github.com/login?return_to=https%3A%2F%2Fgithub.com%2FBunlong%2FThe-Modern-JavaScript-Tutorial%2Fwiki%2F1.1-An-Introduction-to-JavaScript
Sign up https://Github.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=Bunlong%2FThe-Modern-JavaScript-Tutorial
Reloadhttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
Reloadhttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
Reloadhttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
Bunlong https://Github.com/Bunlong
The-Modern-JavaScript-Tutorialhttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial
Notifications https://Github.com/login?return_to=%2FBunlong%2FThe-Modern-JavaScript-Tutorial
Fork 8 https://Github.com/login?return_to=%2FBunlong%2FThe-Modern-JavaScript-Tutorial
Star 26 https://Github.com/login?return_to=%2FBunlong%2FThe-Modern-JavaScript-Tutorial
Code https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial
Issues 0 https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/issues
Pull requests 0 https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/pulls
Actions https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/actions
Projects https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/projects
Wiki https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki
Security and quality 0 https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/security
Insights https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/pulse
Code https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial
Issues https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/issues
Pull requests https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/pulls
Actions https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/actions
Projects https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/projects
Wiki https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki
Security and quality https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/security
Insights https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/pulse
Jump to bottomhttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#wiki-pages-box
4 revisionshttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript/_history
https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#what-is-javascript
Javahttps://en.wikipedia.org/wiki/Java
https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#why-javascript
ECMAScripthttps://en.wikipedia.org/wiki/ECMAScript
JavaScript enginehttps://en.wikipedia.org/wiki/JavaScript_engine
V8https://en.wikipedia.org/wiki/JavaScript_engine
SpiderMonkeyhttps://en.wikipedia.org/wiki/SpiderMonkey
https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#how-engines-work
https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#what-can-in-browser-javascript-do
Node.JShttps://en.wikipedia.org/wiki/Node.js
AJAXhttps://en.wikipedia.org/wiki/Ajax_(programming)
COMEThttps://en.wikipedia.org/wiki/Comet_(programming)
https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#what-cant-in-browser-javascript-do
NSAhttps://en.wikipedia.org/wiki/National_Security_Agency
http://anysite.comhttp://anysite.com
http://gmail.comhttp://gmail.com
https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#what-makes-javascript-unique
https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#languages-over-javascript
CoffeeScripthttp://coffeescript.org/
TypeScripthttp://www.typescriptlang.org/
Darthttps://www.dartlang.org/
https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#summary
Home https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
1.1 An Introduction to JavaScript https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
What is JavaScript?https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#what-is-javascript
Why JavaScript?https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#why-javascript
How engines work?https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#how-engines-work
What can in-browser JavaScript do?https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#what-can-in-browser-javascript-do
What CAN’T in-browser JavaScript do?https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#what-cant-in-browser-javascript-do
What makes JavaScript unique?https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#what-makes-javascript-unique
Languages “over” JavaScripthttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#languages-over-javascript
Summaryhttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript#summary
1.2 Code editors https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.2-Code-editors
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
1.3 Developer console https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.3-Developer-console
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.1 Hello, world! https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.1-Hello,-world!
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.10 Conditional operators: if, '?' https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.10-Conditional-operators:-if,-'%3F'
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.11 Logical operators https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.11-Logical-operators
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.12 Loops: while and for https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.12-Loops:-while-and-for
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.13 The "switch" statement https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.13-The-%22switch%22-statement
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.14 Functions https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.14-Functions
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.15 Function expressions and arrows https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.15-Function-expressions-and-arrows
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.16 JavaScript specials https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.16-JavaScript-specials
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.2 Code structure https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.2-Code-structure
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.3 The modern mode, "use strict" https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.3-The-modern-mode,-%22use-strict%22
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.4 Variables https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.4-Variables
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.5 Data types https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.5-Data-types
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.6 Type Conversions https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.6-Type-Conversions
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.7 Operators https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.7-Operators
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.8 Comparisons https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.8-Comparisons
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
2.9 Interaction: alert, prompt, confirm https://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/2.9-Interaction:-alert,-prompt,-confirm
Please reload this pagehttps://Github.com/Bunlong/The-Modern-JavaScript-Tutorial/wiki/1.1-An-Introduction-to-JavaScript
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.