javascript Jquery,如何知道输入何时有:无效选择器?
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时间:2020-10-26 21:29:52 来源:igfitidea点击:
Jquery, how to know when input have a :invalid selector?
提问by Sergio Flores
I have this code:
我有这个代码:
HTML
HTML
<input type="text" data-value="1" data-type="input-records" placeholder="Value" pattern="\d{1,4}$" />
CSS
CSS
input[type=text]:invalid { background-color: red; }
Javascript
Javascript
$("[data-type=input-records]").die().live("keypress", function (e) {
if (!($(this).val().length + 1) < 5) {
e.preventDefault();
return;
}
// More code below...
});
I want to make a validation like this:
我想进行这样的验证:
if (!$(this).hasSelector(":invalid")) {
showMessage("Invalid value");
}
回答by Andrew Whitaker
Use the is
function to test for the :invalid
pseudoclass:
使用is
函数测试:invalid
伪类:
if ($(this).is(":invalid")) {
showMessage("Invalid value");
}
Example:http://jsbin.com/ikuwur/2/edit