网页表单模式和标题不起作用

Question

我尝试创建表单，并通过JS以编程方式设置模式和标题字段。有人可以帮我解决为什么这不起作用。 下面的代码导致无法在表单字段中输入任何内容，弹出错误说＆＃34;匹配请求的格式＆＃34;。

＆＃13;

＆＃13;

var node = document.getElementById("text");
node.setAttribute("pattern", "\d+");
node.setAttribute("title", "Six or more characters");

＆＃13;

<p>A form with a password field that must contain a positive integer:</p>
<form action="/action_page.php">
  Enter a number: <input type="text" id="text" name="text">
  <input type="submit">
</form>

＆＃13;

＆＃13;

＆＃13;

Answer 1

".validate": "newData.isString() && newData.val().matches(/^[\w\][\s]([0-3][0-9])[,\s](19|20)[0-9][0-9]$/)" 是转义字符。如果你想写一个\，你将不得不用\

来逃避它

\\

var node = document.getElementById("text");
node.setAttribute("pattern", "\\d+");
node.setAttribute("title", "Six or more characters");
node.setAttribute("oninvalid", "setCustomValidity('Six or more characters')");
// this line is needed to clear the error status onchange, so user can enter newly correct input
node.setAttribute("onchange", "try{setCustomValidity('')}catch(e){}");