Javascript jQuery 遍历具有相同类的元素

jQuery to loop through elements with the same class

提问by geoffs3310

I have a load of divs with the class testimonialand I want to use jquery to loop through them to check for each div if a specific condition is true. If it is true, it should perform an action.

我有一个类的 div 负载，testimonial我想使用 jquery 循环遍历它们以检查每个 div，如果特定条件为真。如果是真的，它应该执行一个动作。

Does anyone know how I would do this?

有谁知道我会怎么做？

回答by Kees C. Bakker

Use each: 'i' is the postion in the array, objis the DOM object that you are iterating (can be accessed through the jQuery wrapper $(this)as well).

使用每个： ' i' 是数组中的位置，obj是您正在迭代的 DOM 对象（也可以通过 jQuery 包装器访问$(this)）。

$('.testimonial').each(function(i, obj) {
    //test
});

Check the api referencefor more information.

查看api 参考以获取更多信息。

回答by stephen776

try this...

尝试这个...

$('.testimonial').each(function(){
    //if statement here 
    // use $(this) to reference the current div in the loop
    //you can try something like...


    if(condition){

    }


 });

回答by Josh Crozier

It's pretty simple to do this without jQuery these days.

现在不用 jQuery 就可以很简单地做到这一点。

Without jQuery:

没有 jQuery：

Just select the elements and use the .forEach()methodto iterate over them:

只需选择元素并使用该.forEach()方法迭代它们：

const elements = document.querySelectorAll('.testimonial');
Array.from(elements).forEach((element, index) => {
  // conditional logic here.. access element
});

In older browsers:

在旧浏览器中：

var testimonials = document.querySelectorAll('.testimonial');
Array.prototype.forEach.call(testimonials, function(element, index) {
  // conditional logic here.. access element
});

回答by Manoj

Try this example

试试这个例子

Html

html

<div class="testimonial" data-index="1">
    Testimonial 1
</div>
<div class="testimonial" data-index="2">
    Testimonial 2
</div>
<div class="testimonial" data-index="3">
    Testimonial 3
</div>
<div class="testimonial" data-index="4">
    Testimonial 4
</div>
<div class="testimonial" data-index="5">
    Testimonial 5
</div>

When we want to access those divswhich has data-indexgreater than 2then we need this jquery.

当我们想访问那些divs具有data-index大于2那么我们就需要这个jQuery。

$('div[class="testimonial"]').each(function(index,item){
    if(parseInt($(item).data('index'))>2){
        $(item).html('Testimonial '+(index+1)+' by each loop');
    }
});

Working example fiddle

工作示例小提琴

回答by Ghyath Serhal

you can do it this way

你可以这样做

$('.testimonial').each(function(index, obj){
    //you can use this to access the current item
});

回答by Atharva

jQuery's .eq()can help you traverse through elements with an indexed approach.

jQuery 的 .eq()可以帮助您使用索引方法遍历元素。

var testimonialElements = $(".testimonial");
for(var i=0; i<testimonialElements.length; i++){
    var element = testimonialElements.eq(i);
    //do something with element
}

回答by ikostia

divs  = $('.testimonial')
for(ind in divs){
  div = divs[ind];
  //do whatever you want
}

回答by karim79

You can do this concisely using .filter. The following example will hide all .testimonial divs containing the word "something":

您可以使用.filter. 以下示例将隐藏所有包含单词“something”的 .testimonial div：

$(".testimonial").filter(function() {
    return $(this).text().toLowerCase().indexOf("something") !== -1;
}).hide();

回答by Ismail Rubad

With a simple for loop:

用一个简单的 for 循环：

var testimonials= $('.testimonial');
for (var i = 0; i < testimonials.length; i++) {
  // Using $() to re-wrap the element.
  $(testimonials[i]).text('a');
}

回答by KrisInception

Without jQuery updated

没有 jQuery 更新

document.querySelectorAll('.testimonial').forEach(function (element, index) {
    element.innerHTML = 'Testimonial ' + (index + 1);
});

<div class="testimonial"></div>
<div class="testimonial"></div>