webkitSpeechRecognition:HTML5语音识别文字（直接运行）

前端想要实现语音转文字，其实不需要任何云服务，浏览器自带的api就能搞定。

下面是已经封装好的代码，

复制之后可以在控制台只接运行。

class SpeechRecognitionManager {
    tempTranscript = ''
    isRecording = false;
    timeoutid = 0;
    exitKeywors = ['stop', 'exit', 'quit', '退出', '停止识别', '说完了', '停止', '发送', '好了']
    constructor() {
        this.recognition = new webkitSpeechRecognition();
        this.recognition.continuous = true;
        this.recognition.interimResultsTimeout = 30000;
        this.recognition.lang = 'zh-CN';
        this.recognition.maxSpeechTime = 60000;
        this.resultListeners = [];

        this.recognition.onresult = (event) => {
            const transcript = Array.from(event.results).at(-1)[0].transcript;
            clearTimeout(this.timeoutid);
            if (this.exitKeywors.some(keyword => transcript.includes(keyword) && transcript.length <= 7)) {
                this.recognition.stop();
                // this.isRecording = false;
                // this.notifyResultListeners({
                //     transcript: this.tempTranscript,
                //     type: 'end',
                // });

                return;
            }

            this.timeoutid = setTimeout(() => {
                this.recognition.stop();
            }, 4000);
            this.tempTranscript += transcript;
            this.notifyResultListeners({
                transcript,
                type: 'tempresult',
            });
        };
        this.recognition.onend = () => {
            this.isRecording = false;
            this.notifyResultListeners({
                type: 'end',
                transcript: this.tempTranscript
            });
        };
        this.recognition.onerror = (event) => {
            this.isRecording = false;
            this.notifyResultListeners({
                type: 'error',
                transcript: this.tempTranscript,
                error: event.error
            });
        };
        this.recognition.onstart = () => {
            this.isRecording = true;
            this.tempTranscript = '';
            this.notifyResultListeners({
                type: 'start'
            });
        };
    }

    addResultListener(listener) {
        this.resultListeners.push(listener);
    }

    notifyResultListeners(data) {
        this.resultListeners.forEach(listener => {
            listener(data);
        });
    }

    startRecognition() {
        if (this.isRecording) return console.log('正在识别');

        console.log('开始识别');
        this.tempTranscript = '';
        this.recognition.start();
    }

    stopRecognition() {
        if (!this.isRecording) return console.log('未开始识别');
        this.isRecording = false;
        console.log('停止识别');
        this.recognition.stop();
    }
}

// 使用示例
window.speechmanager = new SpeechRecognitionManager();

// // 添加结果监听函数
// speechmanager.addResultListener(transcript => {
//     console.log('识别结果:', transcript);
// });

// // 开始识别
// speechmanager.startRecognition();

// // // 停止识别
// // // manager.stopRecognition();