SpeechGrammar.weight

实验性: 这是一项实验性技术
在将其用于生产之前，请仔细检查浏览器兼容性表格。

SpeechGrammar 接口的可选属性 weight 设置并返回了一个 SpeechGrammar 对象的权重。

语法

var myGrammarWeight = speechGrammarInstance.weight;

值

浮点数表示了当前文法的权重，范围在 0.0-1.0 之间。

样例

js

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;

console.log(speechRecognitionList[0].src); // 应该返回和上面文法变量一样的内容
console.log(speechRecognitionList[0].weight); // 应该返回 1 - 与上面第四行所设置的权重一致

规范

Specification
Web Speech API
# dom-speechgrammar-weight

浏览器兼容性

BCD tables only load in the browser

相关链接