javascript - Jquery 必填字段 - 无插件

Question

<分区>

Answer 1

<input type="text" data-required="true">

然后使用 jQuery:

$('form').submit(function() {
    var faults = $('input').filter(function() {
        // filter input elements to required ones that are empty
        return $(this).data('required') && $(this).val() === "";
    }).css("background-color", "red"); // make them attract the eye
    if(faults.length) return false; // if any required are empty, cancel submit
});

http://jsfiddle.net/evpS9/1/