[英]How to fix issue with audio.play()?
我正在嘗試使用JavaScript Audio對象。 我正在密切關注本指南: https : //medium.com/@bryanjenningz/how-to-record-and-play-audio-in-javascript-faa1b2b3e49b 。
在第6部分中,我應該在Audio對象上調用play(),但是我收到一條錯誤消息,提示“未捕獲的TypeError:audio.play不是函數”,而且我不確定自己做錯了什么。 有什么幫助嗎?
編輯:到目前為止的代碼:
import React, { Component } from 'react'
class Audio extends Component {
constructor() {
super();
this.state = {
showButton: true,
};
}
recordAudio = () => {
this.setState({ showButton: false })
navigator.mediaDevices.getUserMedia({ audio: true })
.then(stream => {
this.setState({ mediaRecorder: new MediaRecorder(stream) })
this.state.mediaRecorder.start();
const audioChunks = [];
this.state.mediaRecorder.addEventListener("dataavailable", event => {
audioChunks.push(event.data);
});
this.state.mediaRecorder.addEventListener("stop", () => {
const audioBlob = new Blob(audioChunks);
const audioUrl = URL.createObjectURL(audioBlob);
const audio = new Audio(audioUrl);
console.log(audio);
audio.play();
});
});
}
stopRecording = () => {
this.setState({ showButton: true })
this.state.mediaRecorder.stop();
}
render() {
return (
<div>
{/* This is a ternary operator that changes the button that is shown */}
{
this.state.showButton ?
<button type="button" onClick={this.recordAudio}> Start Recording </button> :
<button type="button" onClick={this.stopRecording}> Stop Recording </button>
}
</div>
)
}
}
export default Audio;
編輯:console.log(音頻)輸出:
Audio {props: undefined, context: undefined, refs: {…}, updater: {…}, recordAudio: ƒ, …}
context:undefined
props:undefined
recordAudio:ƒ ()
refs:{}
state:{showButton: true}
stopRecording:ƒ ()
updater:{isMounted: ƒ, enqueueForceUpdate: ƒ, enqueueReplaceState: ƒ, enqueueSetState: ƒ}
isMounted:(...)
replaceState:(...)
__proto__:ReactComponent
Kaiido的評論為我解決了這個問題。 因為我已經將類命名為“ Audio”並調用了“ Audio”構造函數(當我以為我正在調用window.Audio時),所以它沒有創建適當的對象。
根據他們的解決方案,重命名該類,調用window.Audio或調用默認window.Audio功能,如其注釋中所述。
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