App下載
實(shí)例代碼( Tip: 登錄后體驗(yàn)更佳 )
<!DOCTYPE html>
<html>
<body>
Homepage: <input type="url" id="myURL">
<p>点击按钮设置 URL 字段允许输入的最大字符数。</p>
<button onclick="myFunction()">点我</button>
<p id="demo"></p>
<script>
function myFunction() {
    document.getElementById("myURL").maxLength = "8";
    document.getElementById("demo").innerHTML = "现在 url 字段允许输入的最大字符数为  8。";
}
</script>
</body>
</html>
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