回答編集履歴
2
onend について追加
test
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@@ -69,3 +69,195 @@
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あと `var` は使わないで `let` と `const` 使うようにして……。
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追記 2:
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すみません、ドキュメントをよく読んだら onend イベントがありました……。なのでそれを使えば大丈夫です。
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[SpeechSynthesisUtterance - Web API | MDN](https://developer.mozilla.org/ja/docs/Web/API/SpeechSynthesisUtterance#event_handlers)
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アロー関数にしてるのは `function` だと `this` が参照先で変わってしまうから。
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```HTML
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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<title>React</title>
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<script src="https://unpkg.com/react@17/umd/react.development.js"></script>
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<script src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"></script>
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<script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
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</head>
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<body>
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<div id="root"></div>
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<script type="text/babel">
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(() => {
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class App extends React.Component {
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constructor() {
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super();
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this.state = {
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answer: "abc",
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blank: "a__",
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location: 1,
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speaking: undefined,
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}
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this.keydown = this.keydown.bind(this)
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this.speak = this.speak.bind(this)
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}
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speak(word) {
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var speech = new SpeechSynthesisUtterance(word)
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speech.onend = () => {
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this.setState({
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...this.state,
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answer: "def",
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blank: "d__",
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location: 1,
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});
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}
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speechSynthesis.speak(speech)
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}
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keydown(e) {
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console.log(e.key)
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if (this.state.answer[this.state.location] == e.key) {
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this.setState((state, props) => ({
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location: state.location + 1
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}));
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let blank = this.state.answer.substring(0, this.state.location) + '_'.repeat(this.state.blank.length - this.state.location);
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this.setState({
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blank: blank
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})
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console.log(blank)
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if (this.state.answer.length == this.state.location) {
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this.speak(this.state.answer)
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}
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}
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}
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componentDidMount() {
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window.addEventListener('keydown', this.keydown)
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}
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render() {
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return (
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<div>
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<div>
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{this.state.answer}
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</div>
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<div>
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{this.state.blank}
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</div>
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</div>
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);
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}
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}
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ReactDOM.render(
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<App />,
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document.getElementById('root')
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);
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})();
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</script>
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</body>
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</html>
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```
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1
speaking について追記
test
CHANGED
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@@ -31,3 +31,41 @@
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31
31
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```
|
|
32
32
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33
33
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ではどうでしょうか。
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追記：
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音声が終わる前に次の回答がセットされるのを防ぐには `SpeechSynthesis.speaking` を使うのが良さそうです。
|
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+
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[SpeechSynthesis.speaking - Web APIs | MDN](https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesis/speaking)
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42
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まず
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```JavaScript
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46
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speech = speechSynthesis.speak(utterance) // speak だと名前が紛らわしいので変えた
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this.setState({...this.state,speech}) // スプレッド演算子でコピーを取らないと意図しない挙動をすることがあるので注意
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```
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として適当に状態にオブジェクトを保存しておきます。次に正解したときの処理を
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54
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+
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55
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+
```JavaScript
|
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56
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+
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57
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+
if (this.state.answer.length == this.state.location) {
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this.speak(this.state.answer)
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while(this.state.speech.speaking);
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}
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64
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65
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```
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66
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+
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67
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+
とすれば `speaking` が `false` になるまで待つことができるでしょう。
|
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68
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+
|
|
69
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+
|
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70
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+
|
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71
|
+
あと `var` は使わないで `let` と `const` 使うようにして……。
|