SpeechGrammarList

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构造函数
特性
方法
范例
规范
浏览器兼容性
另请参阅
相关话题

这是实验性技术
检查浏览器兼容性表格要小心谨慎在生产中使用这之前。

SpeechGrammarList 接口在 Web 语音 API represents a list of SpeechGrammar objects containing words or patterns of words that we want the recognition service to recognize.

Grammar is defined using JSpeech Grammar Format ( JSGF .) Other formats may also be supported in the future.

构造函数

SpeechGrammarList.SpeechGrammarList(): 创建新的 SpeechGrammarList 对象。

特性

SpeechGrammarList.length 只读: Returns the number of SpeechGrammar objects contained in the SpeechGrammarList .

方法

SpeechGrammarList.item(): Standard getter — allows individual SpeechGrammar objects to be retrieved from the SpeechGrammarList using array syntax.
SpeechGrammarList.addFromURI(): Takes a grammar present at a specific URI and adds it to the SpeechGrammarList as a new SpeechGrammar 对象。
SpeechGrammarList.addFromString(): Takes a grammar present in a specific DOMString within the code base (e.g. stored in a variable) and adds it to the SpeechGrammarList as a new SpeechGrammar 对象。

范例

In our simple Speech color changer example, we create a new SpeechRecognition object instance using the SpeechRecognition() constructor, create a new SpeechGrammarList , add our grammar string to it using the SpeechGrammarList.addFromString method, and set it to be the grammar that will be recognised by the SpeechRecognition instance using the SpeechRecognition.grammars 特性。

var grammar = '#JSGF V1.0; grammar colors; public <color> = aqua | azure | beige | bisque | black | blue | brown | chocolate | coral | crimson | cyan | fuchsia | ghostwhite | gold | goldenrod | gray | green | indigo | ivory | khaki | lavender | lime | linen | magenta | maroon | moccasin | navy | olive | orange | orchid | peru | pink | plum | purple | red | salmon | sienna | silver | snow | tan | teal | thistle | tomato | turquoise | violet | white | yellow ;'
var recognition = new SpeechRecognition();
var speechRecognitionList = new SpeechGrammarList();
speechRecognitionList.addFromString(grammar, 1);
recognition.grammars = speechRecognitionList;

规范

规范	状态	注释
Web 语音 API The definition of 'SpeechGrammarList()' in that specification.	草案

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`SpeechGrammarList`	Chrome 33 Prefixed 33 Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Edge ≤79 Prefixed ≤79 Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Firefox No	IE No	Opera No	Safari No	WebView Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Chrome Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Firefox Android No	Opera Android No	Safari iOS No	Samsung Internet Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.
`SpeechGrammarList()` 构造函数	Chrome 33 Prefixed 33 Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Edge ≤79 Prefixed ≤79 Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Firefox No	IE No	Opera No	Safari No	WebView Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Chrome Android Yes Yes You'll need to serve your code through a web server for recognition to work.	Firefox Android No	Opera Android No	Safari iOS No	Samsung Internet Android Yes Yes You'll need to serve your code through a web server for recognition to work.
`addFromString`	Chrome 33 Prefixed 33 Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Edge ≤79 Prefixed ≤79 Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Firefox No	IE No	Opera No	Safari No	WebView Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Chrome Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Firefox Android No	Opera Android No	Safari iOS No	Samsung Internet Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.
`addFromURI`	Chrome 33 Prefixed 33 Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Edge ≤79 Prefixed ≤79 Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Firefox No	IE No	Opera No	Safari No	WebView Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Chrome Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Firefox Android No	Opera Android No	Safari iOS No	Samsung Internet Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.
`item`	Chrome 33 Prefixed 33 Prefixed Prefixed Implemented with the vendor prefix: webkit	Edge ≤79 Prefixed ≤79 Prefixed Prefixed Implemented with the vendor prefix: webkit	Firefox No	IE No	Opera No	Safari No	WebView Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Chrome Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit	Firefox Android No	Opera Android No	Safari iOS No	Samsung Internet Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit
`length`	Chrome 33 Prefixed 33 Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Edge ≤79 Prefixed ≤79 Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Firefox No	IE No	Opera No	Safari No	WebView Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Chrome Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Firefox Android No	Opera Android No	Safari iOS No	Samsung Internet Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.

图例

完整支持
不支持
实验。期望将来行为有所改变。

要求使用供应商前缀或不同名称。

Firefox OS permissions

To use speech recognition in an app, you need to specify the following permissions in your manifest :

"permissions": {
  "audio-capture" : {
    "description" : "Audio capture"
  },
  "speech-recognition" : {
    "description" : "Speech recognition"
  }
}

You also need a privileged app, so you need to include this as well:

  "type": "privileged"

另请参阅

Web 语音 API

元数据

最后修改： 2019 年 3 月 23 日

在此页

构造函数

特性

方法

范例

规范

浏览器兼容性

图例

Firefox OS permissions

另请参阅

相关话题