FetchBaseline · Widely available

The fetch() method makes asynchronous HTTP requests.

Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Mar 27, 2017. Widely available since Sep 27, 2019.

How to use ↓Compare browsers

Browser support

DesktopChrome

1–41Not supported

42+Supportedsince Apr 14, 2015

Current: 155

Edge

12–13Not supported

14+Supportedsince Aug 2, 2016

Current: 154

Firefox

1–38Not supported

39+Supportedsince Jul 2, 2015

Current: 157

Safari

1–10Not supported

10.1+Supportedsince Mar 27, 2017

Current: 27

MobileChrome Android

18–41Not supported

42+Supportedsince Apr 15, 2015

Current: 155

Firefox Android

4–38Not supported

39+Supportedsince Jul 2, 2015

Current: 157

Safari iOS

1–10Not supported

10.3+Supportedsince Mar 27, 2017

Current: 27

How to use

This feature is Baseline widely available — use it freely, no fallback needed.

Example

const response = await fetch("/api/users", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({ name: "Ada" }),
});

if (!response.ok) throw new Error(`HTTP ${response.status}`);
const user = await response.json();

Feature detection

JS · check before using

if ("fetch" in globalThis) {
  // fetch() is available
} else {
  // fall back to XMLHttpRequest or load a polyfill
}

Documentation (MDN)

Specification

fetch.spec.whatwg.org ↗

Usage share

caniuse.com/fetch ↗

Sub-features

Support for each part of the feature (76). The overall table above shows when the whole feature works.

Sub-feature	Chrome	Edge	Firefox	Safari	Chrome Android	Firefox Android	Safari iOS
Headers	42	14	39	10.1	42	39	10.3
Headers.@@iterator	42	16	44	10.1	42	44	10.3
Headers.Headers	42	14	39	10.1	42	39	10.3
Headers.append	42	14	39	10.1	42	39	10.3
Headers.delete	42	14	39	10.1	42	39	10.3
Headers.entries	42	16	44	10.1	42	44	10.3
Headers.forEach	42	14	47	10.1	42	47	10.3
Headers.get	42	14	39	10.1	42	39	10.3
Headers.getSetCookie	113	113	112	17	113	112	17
Headers.has	42	14	39	10.1	42	39	10.3
Headers.iterate_combined_duplicates	57	16	57	10.1	57	57	10.3
Headers.iterate_lexicographically	57	18	57	10.1	57	57	10.3
Headers.keys	42	16	44	10.1	42	44	10.3
Headers.set	42	14	39	10.1	42	39	10.3
Headers.values	42	16	44	10.1	42	44	10.3
Request	42	14	39	10.1	42	39	10.3
Request.Request	42	14	39	10.1	42	39	10.3
Request.Request.cross_origin_stripped	69	15	54	10.1	69	54	10.3
Request.Request.options_parameter	42	14	39	10.1	42	39	10.3
Request.Request.options_parameter.body	42	14	39	10.1	42	39	10.3

Show 56 more

Sub-feature	Chrome	Edge	Firefox	Safari	Chrome Android	Firefox Android	Safari iOS
Request.Request.options_parameter.keepalive	66	15	133	13	66	133	13
Request.Request.options_parameter.referrer	47	15	47	10.1	47	47	10.3
Request.Request.response_body_readablestream	43	79	65	✕	43	65	10.3
Request.arrayBuffer	42	14	39	10.1	42	39	10.3
Request.blob	42	14	39	10.1	42	39	10.3
Request.bodyUsed	42	14	39	10.1	42	39	10.3
Request.bytes	132	132	128	18	132	128	18
Request.cache	64	14	48	10.1	64	48	10.3
Request.cache.only-if-cached	64	79	50	10.1	64	50	10.3
Request.clone	42	14	39	10.1	42	39	10.3
Request.credentials	42	14	39	10.1	42	39	10.3
Request.credentials.default_same-origin	72	18	61	12.1	72	61	12.2
Request.destination	65	14	61	10.1	65	61	10.3
Request.duplex	131	131	✕	✕	131	✕	✕
Request.headers	42	14	39	10.1	42	39	10.3
Request.isHistoryNavigation	69	79	✕	✕	69	✕	✕
Request.json	42	14	39	10.1	42	39	10.3
Request.keepalive	66	15	133	13	66	133	13
Request.method	42	14	39	10.1	42	39	10.3
Request.mode	42	14	39	10.1	42	39	10.3
Request.mode.navigate_mode	49	≤18	46	10.1	49	✕	10.3
Request.redirect	46	14	43	10.1	46	43	10.3
Request.referrer	42	14	39	10.1	42	39	10.3
Request.referrerPolicy	52	14	47	10.1	52	47	10.3
Request.text	42	14	39	10.1	42	39	10.3
Request.url	42	14	39	10.1	42	39	10.3
Response	42	14	39	10.1	42	39	10.3
Response.Response	42	14	39	10.1	42	39	10.3
Response.Response.accept_readablestream	52	79	39	10.1	52	39	10.3
Response.Response.body_parameter_optional	42	79	59	10.1	42	59	10.3
Response.arrayBuffer	42	14	39	10.1	42	39	10.3
Response.blob	42	14	39	10.1	42	39	10.3
Response.body	43	14	65	10.1	43	65	10.3
Response.body.readable_byte_stream	116	116	102	26.4	116	102	26.4
Response.bodyUsed	42	14	39	10.1	42	39	10.3
Response.bytes	132	132	128	18	132	128	18
Response.clone	42	14	39	10.1	42	39	10.3
Response.error_static	43	16	39	10.1	43	39	10.3
Response.headers	42	14	39	10.1	42	39	10.3
Response.json	42	14	39	10.1	42	39	10.3
Response.json_static	105	105	115	17	105	115	17
Response.ok	42	14	39	10.1	42	39	10.3
Response.redirect_static	44	16	39	10.1	44	39	10.3
Response.redirected	57	16	49	10.1	57	49	10.3
Response.status	42	14	39	10.1	42	39	10.3
Response.statusText	42	14	39	10.1	42	39	10.3
Response.text	42	14	39	10.1	42	39	10.3
Response.type	42	14	39	10.1	42	39	10.3
Response.url	42	14	39	10.1	42	39	10.3
fetch	42	14	39	10.1	42	39	10.3
fetch.authorization_removed_cross_origin	✕	✕	111	16.1	✕	111	16.1
fetch.blob_data_support	48	79	39	10.1	48	39	10.3
fetch.options_parameter	42	14	39	10.1	42	39	10.3
fetch.options_parameter.body	42	14	39	10.1	42	39	10.3
fetch.options_parameter.keepalive	66	15	133	13	66	133	13
fetch.options_parameter.referrerPolicy	52	79	52	11.1	52	52	✕