--- title: Response.arrayBuffer() slug: Web/API/Response/arrayBuffer translation_of: Web/API/Response/arrayBuffer tags: - API - ArrayBuffer - Fetch - Method - Reference - Response browser-compat: api.Response.arrayBuffer ---

{{APIRef("Fetch")}}{{ SeeCompatTable() }}

 {{domxref("Response")}}上的方法 arrayBuffer() 接受一个 {{domxref("Response")}} 流, 并等待其读取完成. 它返回一个 promise 实例, 并 resolve 一个 {{domxref("ArrayBuffer")}} 对象.

语法

response.arrayBuffer().then(function(buffer) {
  // do something with buffer
)};

参数

无。

返回值

A promise that resolves with an {{domxref("ArrayBuffer")}}.

例子

In our fetch array buffer example (run fetch array buffer live), we have a Play button. When pressed, the getData() function is run.

In getData() we create a new request using the {{domxref("Request.Request")}} constructor, then use it to fetch an OGG music track. We also use {{domxref("AudioContext.createBufferSource")}} to create an audio buffer source.  When the fetch is successful, we read an {{domxref("ArrayBuffer")}} out of the response using arrayBuffer(), decode the audio data using {{domxref("AudioContext.decodeAudioData")}}, set the decoded data as the audio buffer source's buffer (source.buffer), then connect the source up to the {{domxref("AudioContext.destination")}}.

Once getData() has finished running, we start the audio source playing with start(0), then disable the play button so it can't be clicked again when it is already playing (this would cause an error.)

function getData() {
  source = audioCtx.createBufferSource();

  var myRequest = new Request('viper.ogg');

  fetch(myRequest).then(function(response) {
    response.arrayBuffer().then(function(buffer) {
      audioCtx.decodeAudioData(buffer, function(decodedData) {
        source.buffer = decodedData;
        source.connect(audioCtx.destination);
      });
    });
  });
};

// wire up buttons to stop and play audio

play.onclick = function() {
  getData();
  source.start(0);
  play.setAttribute('disabled', 'disabled');
}

标准

标准 状态 备注
{{SpecName('Fetch','#dom-body-arraybuffer','arrayBuffer()')}} {{Spec2('Fetch')}}  

浏览器兼容性

{{ CompatibilityTable() }}

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support {{ CompatChrome(41) }}[1]
{{ CompatChrome(42) }}
 		 34[1]
{{ CompatGeckoDesktop(39)}}		 {{ CompatNo }}

28[1]
29

 {{ CompatNo }}
Feature Android Firefox Mobile (Gecko) Firefox OS (Gecko) IE Phone Opera Mobile Safari Mobile Chrome for Android
Basic support {{ CompatNo }} {{ CompatNo }} {{ CompatNo }} {{ CompatNo }} {{ CompatNo }} {{ CompatNo }} {{ CompatNo }}

[1] In Chrome 42, Firefox 34 and Opera 28 support for arrayBuffer() was hidden behind a preference.

参考