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Title: Using Deferred Fetch - Web APIs | MDN

Open Graph Title: Using Deferred Fetch - Web APIs | MDN

Description: The fetchLater() API provides an interface to request a deferred fetch that can be sent after a specified period of time, or when the page is closed or navigated away from.

Open Graph Description: The fetchLater() API provides an interface to request a deferred fetch that can be sent after a specified period of time, or when the page is closed or navigated away from.

Opengraph URL: https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch

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Skip to main contenthttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#content
Skip to searchhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#search
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Using the Web animation APIhttps://developer.mozilla.org/en-US/docs/Web/API/Web_Animations_API/Using_the_Web_Animations_API
Using the Fetch APIhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch
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Using Deferred Fetchhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch
https://github.com/orgs/mdn/discussions/739
https://developer.mozilla.org/de/docs/Web/API/Fetch_API/Using_Deferred_Fetch
https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch
https://developer.mozilla.org/ja/docs/Web/API/Fetch_API/Using_Deferred_Fetch
https://developer.mozilla.org/zh-CN/docs/Web/API/Fetch_API/Using_Deferred_Fetch
Overviewhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#overview
Quotashttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#quotas
Quota exampleshttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#quota_examples
Overviewhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#overview
https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/img
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keepalivehttps://developer.mozilla.org/en-US/docs/Web/API/Request/keepalive
unloadhttps://developer.mozilla.org/en-US/docs/Web/API/Window/unload_event
beforeunloadhttps://developer.mozilla.org/en-US/docs/Web/API/Window/beforeunload_event
pagehidehttps://developer.mozilla.org/en-US/docs/Web/API/Window/pagehide_event
visibilitychangehttps://developer.mozilla.org/en-US/docs/Web/API/Document/visibilitychange_event
Fetch APIhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API
AbortControllerhttps://developer.mozilla.org/en-US/docs/Web/API/AbortController
Quotashttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#quotas
deferred-fetchhttps://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Permissions-Policy/deferred-fetch
deferred-fetch-minimalhttps://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Permissions-Policy/deferred-fetch-minimal
Permissions Policyhttps://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Permissions_Policy
Quota limits by reporting origin and subframehttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#quota_limits_by_reporting_origin_and_subframe
Increasing subframe quotas by sharing the top-level quotahttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#increasing_subframe_quotas_by_sharing_the_top-level_quota
deferred-fetchhttps://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Permissions-Policy/deferred-fetch
Restricting the shared quotahttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#restricting_the_shared_quota
deferred-fetch-minimalhttps://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Permissions-Policy/deferred-fetch-minimal
deferred-fetch-minimalhttps://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Permissions-Policy/deferred-fetch-minimal
Delegating quotas to subframes of subframeshttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#delegating_quotas_to_subframes_of_subframes
Permissions-Policyhttps://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Permissions-Policy
When quotas are exceededhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#when_quotas_are_exceeded
fetchLater()https://developer.mozilla.org/en-US/docs/Web/API/Window/fetchLater
Quota exampleshttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#quota_examples
Using up the minimal quotahttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#using_up_the_minimal_quota
Revoke Restricting the minimal quota to named originshttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#revoke_restricting_the_minimal_quota_to_named_origins
Revoking the minimal quota altogether with top-level exceptionshttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#revoking_the_minimal_quota_altogether_with_top-level_exceptions
Revoking the minimal quota altogether with no exceptionshttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#revoking_the_minimal_quota_altogether_with_no_exceptions
Same-origin subframes share quota with the top-level and can delegate to subframeshttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#same-origin_subframes_share_quota_with_the_top-level_and_can_delegate_to_subframes
Same-origin subframes can not share quota with the top-level when separated by a cross-origin subframehttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#same-origin_subframes_can_not_share_quota_with_the_top-level_when_separated_by_a_cross-origin_subframe
Secondary subframes of subframes do not get quota by defaulthttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#secondary_subframes_of_subframes_do_not_get_quota_by_default
Granting the full quota to a further subframehttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#granting_the_full_quota_to_a_further_subframe
Redirects do not transfer quotahttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#redirects_do_not_transfer_quota
Sandboxed same-origin iframes are effectively separate originshttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#sandboxed_same-origin_iframes_are_effectively_separate_origins
Disallowing fetchLater() from iframeshttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#disallowing_fetchlater_from_iframes
allowhttps://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/iframe#allow
Examples which throw a QuotaExceededErrorhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#examples_which_throw_a_quotaexceedederror
Examples which eventually throw a QuotaExceededErrorhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#examples_which_eventually_throw_a_quotaexceedederror
Redirects of subframes back to the top-level origin allow use of the top-level quotahttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch#redirects_of_subframes_back_to_the_top-level_origin_allow_use_of_the_top-level_quota
Learn how to contributehttps://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started
MDN contributorshttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch/contributors.txt
View this page on GitHubhttps://github.com/mdn/content/blob/main/files/en-us/web/api/fetch_api/using_deferred_fetch/index.md?plain=1
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Fetch APIhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API
Using the Fetch APIhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch
Using Deferred Fetchhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Deferred_Fetch
DeferredRequestInithttps://developer.mozilla.org/en-US/docs/Web/API/DeferredRequestInit
FetchLaterResulthttps://developer.mozilla.org/en-US/docs/Web/API/FetchLaterResult
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