用HTML5和JavaScript实现语音合成朗读

你的名字 2022-10-30 10:19 453阅读 0赞

### 用HTML5和JavaScript实现语音合成朗读 ###

win10环境下

先给出效果图，最后给出完整代码

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NuZHMxMjM_size_16_color_FFFFFF_t_70][]

完整代码如下：

<!DOCTYPE html>
    <html>
    
    	<head>
    		<meta charset="UTF-8">
    		<meta name="viewport" content="width=device-width, initial-scale=1">
    		<title>网页版文字转语音朗读功能</title>
    		<style>
    			article {margin: 0 auto;max-width: 800px;text-align: center;}
    			textarea {max-width: 600px;width:100%;text-align: left;}
    			button{border-radius: 3px;border: 1px solid #dddddd;height: 30px;width: 80px;cursor: pointer;}
    		</style>
    	</head>
    
    	<body>
    		<article>
    			<h3 align="center">请在下面文本框中输入要朗读的文本：</h3>
    			<p>
    				<textarea id="texts" rows="15" class="_play">本网页版本语音合成播报支持Microsoft Edge等浏览器，不必连接网络。</textarea>
    			</p>
    			<p>
    				<label>选择播报语音：</label>
    				<select id="voiceSelect" onchange="play()"></select>
    			</p>
    			<button class="_search" onclick="play()">开始</button>
    			<button onclick="resume()">继续</button>
    			<button onclick="pause()">暂停</button>
    			
    			<button onclick="cls()">清空文本</button>
    		</article>
    	</body>
    	<script>
    		if(!('speechSynthesis' in window)) {
    			throw alert("对不起，您的浏览器不支持")
    		}
    
    		var _play = document.querySelector("._play"),
    			to_speak = window.speechSynthesis,
    			dataName, voiceSelect = document.querySelector("#voiceSelect"),
    			voices = [];
    
    		function play() {
    			myCheckFunc();//检查文本框是否为空
    			cancel(); //
    			to_speak = new SpeechSynthesisUtterance(_play.value);
    
    			//to_speak.rate = 1.4;// 设置播放语速，范围：0.1 - 10之间
    
    			var selectedOption = voiceSelect.selectedOptions[0].getAttribute('data-name');
    			for(i = 0; i < voices.length; i++) {
    				if(voices[i].name === selectedOption) {
    					to_speak.voice = voices[i];
    				}
    			}
    
    			window.speechSynthesis.speak(to_speak);
    
    		}
    
    		//暂停
    		function pause() {
    			myCheckFunc();//检查文本框是否为空
    			window.speechSynthesis.pause();
    		}
    		//继续播放
    		function resume() {
    			myCheckFunc();//检查文本框是否为空
    			window.speechSynthesis.resume(); //继续
    		}
    		//清除所有语音播报创建的队列
    		function cancel() {
    			window.speechSynthesis.cancel();
    		}
    		//清空文本框
    		function cls()  {
    			 document.getElementById("texts").value=""; 清空文本框
    		}
    		//检查文本框是否为空
    		function myCheckFunc() {
    		        let x;
    		        x = document.getElementById("texts").value;
    		        try {
    		            if (x === "")
    		                throw "文本框为空";
                
    		        } catch (error) {
    		            alert( "提示" + error);
    		        }
    		}
    
    		//创建选择语言的select标签
    		function populateVoiceList() {
    			voices = speechSynthesis.getVoices();
    			for(i = 0; i < voices.length; i++) {
    				var option = document.createElement('option');
    				option.textContent = voices[i].name + ' (' + voices[i].lang + ')';
    
    				if(voices[i].default) {
    					option.textContent += ' -- DEFAULT';
    				}
    				option.setAttribute('data-lang', voices[i].lang);
    				option.setAttribute('data-name', voices[i].name);
    				voiceSelect.appendChild(option);
    			}
    		}
    
    		setTimeout(function() {
    			populateVoiceList();
    		}, 500) //
    	</script>
    
    </html>

保存为文件名为 网页版文字转语音朗读.html，用浏览器打开后显示如上图，选择适当的播报语言，再单击“开始”按钮就开始播报了，你可以在文本框中输入要朗读的文字。

参考资料：[https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesis][https_developer.mozilla.org_en-US_docs_Web_API_SpeechSynthesis]

**附**

HTML5 中使用浏览器进行语音合成以及使用免费语音合成进行朗读 [https://blog.csdn.net/dengmengxin/article/details/88668634][https_blog.csdn.net_dengmengxin_article_details_88668634]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NuZHMxMjM_size_16_color_FFFFFF_t_70]: /images/20221024/2bf65cd45806425eb40b4197eca517ba.png
[https_developer.mozilla.org_en-US_docs_Web_API_SpeechSynthesis]: https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesis
[https_blog.csdn.net_dengmengxin_article_details_88668634]: https://blog.csdn.net/dengmengxin/article/details/88668634