jQuery to loop through elements with the same class

问题

I have a load of divs with the class testimonial and 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.

Does anyone know how I would do this?

回答1:

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

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

Check the api reference for more information.

回答2:

try this...

$('.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3:

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

Without jQuery:

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

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

回答4:

Try this example

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 divs which has data-index greater than 2 then we need this 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

回答5:

you can do it this way

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

回答6:

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

回答7:

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

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

回答8:

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

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

回答9:

With a simple for loop:

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

回答10:

I may be missing part of the question, but I believe you can simply do this:

$('.testimonial').each((index, element) => {
    if (/* Condition */) {
        // Do Something
    }
});

This uses jQuery's each method: https://learn.jquery.com/using-jquery-core/iterating/

回答11:

Without jQuery updated

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

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

回答12:

$('.testimonal').each(function(i,v){
  if (condition) {
    doSomething();
  }
});

回答13:

More precise:

$.each($('.testimonal'), function(index, value) { 
    console.log(index + ':' + value); 
});

回答14:

In JavaScript ES6 .forEach() over an array-like NodeList collection given by Element.querySelectorAll()

document.querySelectorAll('.testimonial').forEach( el => {
  el.style.color = 'red';
  console.log( `Element ${el.tagName} with ID #${el.id} says: ${el.textContent}` );
});

<p class="testimonial" id="1">This is some text</p>
<div class="testimonial" id="2">Lorem ipsum</div>

回答15:

You could use the jQuery $each method to loop through all the elements with class testimonial. i => is the index of the element in collection and val gives you the object of that particular element and you can use "val" to further access the properties of your element and check your condition.

$.each($('.testimonal'), function(i, val) { 
    if(your condition){
       //your action
    }
});

来源：https://stackoverflow.com/questions/4735342/jquery-to-loop-through-elements-with-the-same-class