mandFields [i] .css不是函数第6行 [英] mandFields[i].css is not a function Line 6

问题描述

我通过以下代码得到该错误.有人知道为什么吗?

I get that error with the following code. anyone know why?

function validateAdminInput(){
    var mandFields = $('.mand');

    for(i=0; i< mandFields.length;i++){
        if (mandFields[i].value == ""){
            mandFields[i].css('border','solid red 1px');
        }
    }
}

推荐答案

mandFields[i]提供了基础DOM元素.如果要访问jQuery .css()函数，则需要将其包装在$(mandFields[i])中.

mandFields[i] gives you the underlying DOM element. You need to wrap it in a $(mandFields[i]) if you want to access the jQuery .css() function.

或者:

function validateAdminInput() {
    $('.mand').each(function() {
        if ($(this).val() == '') {
            $(this).css('border','solid red 1px');
        }
    });
}

甚至:

function validateAdminInput() {
    $('.mand[value=""]').css('border','solid red 1px');
}

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