Web/API/SourceBuffer

The SourceBuffer interface represents a chunk of media to be passed into an HTMLMediaElement and played, via a MediaSource object. This can be made up of one or several media segments.

  <div id="interfaceDiagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 11.666666666666666%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 70" preserveAspectRatio="xMinYMin meet"><a xlink:href="https://developer.mozilla.org/en-US/docs/Web/API/EventTarget" target="_top"><rect x="1" y="1" width="110" height="50" fill="#fff" stroke="#D4DDE4" stroke-width="2px" /><text  x="56" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">EventTarget</text></a><polyline points="111,25  121,20  121,30  111,25" stroke="#D4DDE4" fill="none"/><line x1="121" y1="25" x2="151" y2="25" stroke="#D4DDE4"/><a xlink:href="https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer" target="_top"><rect x="151" y="1" width="120" height="50" fill="#F4F7F8" stroke="#D4DDE4" stroke-width="2px" /><text  x="211" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">SourceBuffer</text></a></svg></div>

  a:hover text { fill: #0095DD; pointer-events: all;}

Properties

SourceBuffer.appendWindowEnd: Controls the timestamp for the end of the append window.
SourceBuffer.appendWindowStart: Controls the timestamp for the start of the append window. This is a timestamp range that can be used to filter what media data is appended to the SourceBuffer. Coded media frames with timestamps within this range will be appended, whereas those outside the range will be filtered out.
SourceBuffer.audioTracks Read only: A list of the audio tracks currently contained inside the SourceBuffer.
SourceBuffer.buffered Read only: Returns the time ranges that are currently buffered in the SourceBuffer.
SourceBuffer.mode: Controls how the order of media segments in the SourceBuffer is handled, in terms of whether they can be appended in any order, or they have to be kept in a strict sequence.
SourceBuffer.textTracks Read only: A list of the text tracks currently contained inside the SourceBuffer.
SourceBuffer.timestampOffset: Controls the offset applied to timestamps inside media segments that are subsequently appended to the SourceBuffer.
SourceBuffer.trackDefaults: Specifies the default values to use if kind, label, and/or language information is not available in the initialization segment of the media to be appended to the SourceBuffer.
SourceBuffer.updating Read only: A boolean indicating whether the SourceBuffer is currently being updated — i.e. whether an SourceBuffer.appendBuffer(), SourceBuffer.appendStream(), or SourceBuffer.remove() operation is currently in progress.
SourceBuffer.videoTracks Read only: A list of the video tracks currently contained inside the SourceBuffer.

Event handlers

SourceBuffer.onabort: Fired whenever SourceBuffer.appendBuffer() or SourceBuffer.appendStream() is ended by a call to SourceBuffer.abort(). SourceBuffer.updating changes from true to false.
SourceBuffer.onerror: Fired whenever an error occurs during SourceBuffer.appendBuffer() or SourceBuffer.appendStream(). SourceBuffer.updating changes from true to false.
SourceBuffer.onupdate: Fired whenever SourceBuffer.appendBuffer() method or the SourceBuffer.remove() completes. SourceBuffer.updating changes from true to false. This event is fired before onupdateend.
SourceBuffer.onupdateend: Fired whenever SourceBuffer.appendBuffer() method or the SourceBuffer.remove() has ended. This event is fired after onupdate.
SourceBuffer.onupdatestart: Fired whenever the value of SourceBuffer.updating transitions from false to true.

Methods

Inherits methods from its parent interface, EventTarget.

SourceBuffer.abort(): Aborts the current segment and resets the segment parser.
SourceBuffer.appendBuffer(): Appends media segment data from an ArrayBuffer or ArrayBufferView object to the SourceBuffer.
SourceBuffer.appendBufferAsync() ': Starts the process of asynchronously appending the specified buffer to the SourceBuffer. Returns a Promise which is fulfilled once the buffer has been appended.
SourceBuffer.appendStream(): Appends media segment data from a ReadableStream object to the SourceBuffer.
SourceBuffer.changeType(): Changes the MIME type that future calls to appendBuffer() will expect the new data to conform to.
SourceBuffer.remove(): Removes media segments within a specific time range from the SourceBuffer.
SourceBuffer.removeAsync() ': Starts the process of asynchronously removing media segments in the specified range from the SourceBuffer. Returns a Promise which is fulfilled once all matching segments have been removed.

Examples

The following simple example loads a video chunk by chunk as fast as possible, playing it as soon as it can. This example was written by Nick Desaulniers and can be viewed live here (you can also download the source for further investigation.)

var video = document.querySelector('video');

var assetURL = 'frag_bunny.mp4';
// Need to be specific for Blink regarding codecs
// ./mp4info frag_bunny.mp4 | grep Codec
var mimeCodec = 'video/mp4; codecs="avc1.42E01E, mp4a.40.2"';

if ('MediaSource' in window && MediaSource.isTypeSupported(mimeCodec)) {
  var mediaSource = new MediaSource();
  //console.log(mediaSource.readyState); // closed
  video.src = URL.createObjectURL(mediaSource);
  mediaSource.addEventListener('sourceopen', sourceOpen);
} else {
  console.error('Unsupported MIME type or codec: ', mimeCodec);
}

function sourceOpen (_) {
  //console.log(this.readyState); // open
  var mediaSource = this;
  var sourceBuffer = mediaSource.addSourceBuffer(mimeCodec);
  fetchAB(assetURL, function (buf) {
    sourceBuffer.addEventListener('updateend', function (_) {
      mediaSource.endOfStream();
      video.play();
      //console.log(mediaSource.readyState); // ended
    });
    sourceBuffer.appendBuffer(buf);
  });
}

function fetchAB (url, cb) {
  console.log(url);
  var xhr = new XMLHttpRequest;
  xhr.open('get', url);
  xhr.responseType = 'arraybuffer';
  xhr.onload = function () {
    cb(xhr.response);
  };
  xhr.send();
}

Specifications

Specification	Status	Comment
Media Source ExtensionsThe definition of 'SourceBuffer' in that specification.	Recommendation	Initial definition.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`SourceBuffer`	Chrome Full support 31 Full support 31 No support 23 — 31 Prefixed' Prefixed' Implemented with the vendor prefix: WebKit	Edge Full support 12	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 18 Full support 18 No support 15 — 18 Prefixed' Prefixed' Implemented with the vendor prefix: WebKit	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android Full support 31 Full support 31 No support 25 — 31 Prefixed' Prefixed' Implemented with the vendor prefix: WebKit	Firefox Android No support No	Opera Android Full support 18 Full support 18 No support 14 — 18 Prefixed' Prefixed' Implemented with the vendor prefix: WebKit	Safari iOS Partial support 13 Notes' Partial support 13 Notes' Notes' Exposed in Mobile Safari on iPad but not on iPhone.	Samsung Internet Android Full support 3.0 Full support 3.0 No support 2.0 — 3.0 Prefixed' Prefixed' Implemented with the vendor prefix: WebKit
`abort`	Chrome Full support 23	Edge Full support 12	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android Full support 25	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android Full support 2.0
`appendBuffer`	Chrome Full support 23	Edge Full support 12	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android Full support 33	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android Full support 3.0
`appendBufferAsync`	Chrome No support No	Edge No support No	Firefox Full support 62 Disabled' Full support 62 Disabled' Disabled' From version 62: this feature is behind the `media.mediasource.experimental.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android Full support Yes	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support Yes
`appendStream` Deprecated'Non-standard'	Chrome No support No	Edge No support 12 — 79	Firefox No support No	IE ?	Opera No support No	Safari ?	WebView Android ?	Chrome Android ?	Firefox Android No support No	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?
`appendWindowEnd`	Chrome Full support 23	Edge Full support 12	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android Full support 33	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android Full support 3.0
`appendWindowStart`	Chrome Full support 23	Edge Full support 12	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android Full support 33	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android Full support 3.0
`audioTracks`	Chrome Full support 51 Disabled' Full support 51 Disabled' Disabled' From version 51: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`). To change preferences in Chrome, visit chrome://flags.	Edge Full support 79 Disabled' Full support 79 Disabled' Disabled' From version 79: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`). No support 12 — 79	Firefox No support No	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 38 Disabled' Full support 38 Disabled' Disabled' From version 38: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`).	Safari Full support 8	WebView Android No support No	Chrome Android Full support 51 Disabled' Full support 51 Disabled' Disabled' From version 51: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`). To change preferences in Chrome, visit chrome://flags.	Firefox Android No support No	Opera Android Full support 41 Disabled' Full support 41 Disabled' Disabled' From version 41: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`).	Safari iOS Partial support 13 Notes' Partial support 13 Notes' Notes' Exposed in Mobile Safari on iPad but not on iPhone.	Samsung Internet Android No support No
`buffered`	Chrome Full support 23	Edge Full support 12	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android Full support 33	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android Full support 3.0
`changeType` Non-standard'	Chrome Full support 70 Full support 70 No support 69 — 70 Disabled' Disabled' From version 69 until version 70 (exclusive): this feature is behind the `MediaSourceExperimental` preference (needs to be set to `true`). To change preferences in Chrome, visit chrome://flags.	Edge Full support 79	Firefox Full support 63 Full support 63 No support 61 — 63 Disabled' Disabled' From version 61 until version 63 (exclusive): this feature is behind the `media.mediasource.experimental.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE ?	Opera ?	Safari ?	WebView Android Full support 70	Chrome Android Full support 70 Full support 70 No support 69 — 70 Disabled' Disabled' From version 69 until version 70 (exclusive): this feature is behind the `MediaSourceExperimental` preference (needs to be set to `true`). To change preferences in Chrome, visit chrome://flags.	Firefox Android No support No	Opera Android ?	Safari iOS No support No	Samsung Internet Android Full support 10.0
`mode`	Chrome Full support 23	Edge Full support 12	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android Full support 33	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android Full support 3.0
`onabort`	Chrome Full support 53	Edge Full support 17	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android ?	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android ?
`onerror`	Chrome Full support 53	Edge Full support 17	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android ?	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android ?
`onupdate`	Chrome Full support 53	Edge Full support 17	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android ?	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android ?
`onupdateend`	Chrome Full support 53	Edge Full support 17	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android ?	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android ?
`onupdatestart`	Chrome Full support 53	Edge Full support 17	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android ?	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android ?
`remove`	Chrome Full support 23	Edge Full support 12	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android Full support 33	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android Full support 3.0
`removeAsync`	Chrome No support No	Edge No support No	Firefox Full support 62 Disabled' Full support 62 Disabled' Disabled' From version 62: this feature is behind the `media.mediasource.experimental.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android Full support Yes	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support Yes
`textTracks`	Chrome No support No	Edge Full support 18	Firefox No support No	IE No support No	Opera No support No	Safari Full support 8	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS Partial support 13 Notes' Partial support 13 Notes' Notes' Exposed in Mobile Safari on iPad but not on iPhone.	Samsung Internet Android No support No
`timestampOffset`	Chrome Full support 23	Edge Full support 12	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android Full support 33	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android Full support 3.0
`trackDefaults` Deprecated'Non-standard'	Chrome ?	Edge ?	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android ?	Chrome Android ?	Firefox Android No support No	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?
`updating`	Chrome Full support 23	Edge Full support 12	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android Full support 33	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android Full support 3.0
`videoTracks`	Chrome Full support 51 Disabled' Full support 51 Disabled' Disabled' From version 51: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`). To change preferences in Chrome, visit chrome://flags.	Edge Full support 79 Disabled' Full support 79 Disabled' Disabled' From version 79: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`). No support 12 — 79	Firefox No support No	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 38 Disabled' Full support 38 Disabled' Disabled' From version 38: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`).	Safari Full support 8	WebView Android No support No	Chrome Android Full support 51 Disabled' Full support 51 Disabled' Disabled' From version 51: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`). To change preferences in Chrome, visit chrome://flags.	Firefox Android No support No	Opera Android Full support 41 Disabled' Full support 41 Disabled' Disabled' From version 41: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`).	Safari iOS Partial support 13 Notes' Partial support 13 Notes' Notes' Exposed in Mobile Safari on iPad but not on iPhone.	Samsung Internet Android No support No

Legend

Full support: Full support
Partial support: Partial support
No support: No support
Compatibility unknown: Compatibility unknown
Non-standard. Expect poor cross-browser support.': Non-standard. Expect poor cross-browser support.
Deprecated. Not for use in new websites.': Deprecated. Not for use in new websites.
See implementation notes.': See implementation notes.
User must explicitly enable this feature.': User must explicitly enable this feature.
Requires a vendor prefix or different name for use.': Requires a vendor prefix or different name for use.