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SpeechGrammar:weight 属性

Deprecated

Avoid using this feature in new projects. Advancements in speech recognition mean that speech grammars are not needed to achieve low error rates. This feature may be a candidate for removal from web standards or browsers.

非标准: 该特性尚未标准化。我们不建议在生产环境中使用非标准特性,因为它们在浏览器中的支持有限,且可能发生变化或被移除。不过,在没有标准选项的特定情况下,它们可以作为合适的替代方案。

SpeechGrammar 接口的 weight 可选属性用于设置和返回 SpeechGrammar 对象的权重。

表示语法权重的浮点数,范围为 0.0 到 1.0。

示例

js
const 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 ;";
const recognition = new SpeechRecognition();
const speechRecognitionList = new SpeechGrammarList();
speechRecognitionList.addFromString(grammar, 1);
recognition.grammars = speechRecognitionList;

console.log(speechRecognitionList[0].src); // 返回值应与语法变量的内容相同
console.log(speechRecognitionList[0].weight); // 应返回 1——与 addFromString 中设置的权重相同。

规范

规范
Web Speech API
# dom-speechgrammar-weight

浏览器兼容性

参见