App下載
實(shí)例代碼( Tip: 登錄后體驗(yàn)更佳 )
<!DOCTYPE html>
<html>
<body>
E-mail: <input type="email" id="myEmail" value="johndoe@example.com">
<p>点击按钮显示 email 字段的默认值。</p>
<button onclick="myFunction()">尝试一下</button>
<p><strong>注意：</strong> Internet Explorer 9 及更早 IE 版本，Safari 浏览器不支持 &lt;input type="email"&gt; 元素。</p>
<p id="demo"></p>
<script>
function myFunction() {
    var x = document.getElementById("myEmail").defaultValue;
    document.getElementById("demo").innerHTML = x;
}
</script>
</body>
</html>
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