给两个具有相同 class 的元素一个唯一的 id

Question

I am working in Wordpress with Visual Composer, and I have a toggle container. Essentially I click on each tab and the content below changes. I would like to assign a different image to each tab as a background, through css. I have achieved this however since each tab has the same class name (given to it by visual composer) the image is the same. I need to figure out how I can give each tab its own unique id, so that I can give each tab it's own background image - but since I can't edit the html directly, I think I need to do this with javascript. Does anyone know how I can achieve this? Here is the html code below:

<div class="vce-toggle-container-tab">
 <a class="vce-toggle-container-tab-title">Test 1</a>
</div>
<div class="vce-toggle-container-tab">
 <a class="vce-toggle-container-tab-title">Test 2</a>
</div>

And my css to add a background image:

a.vce-toggle-container-tab-title {
    background-image: url("https://katherinemade.com/staging/wp-content/uploads/2021/03/0I1A5234-3.jpg") !important;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    width: 500px;
    height: 500px;
}

I hope I'm explaining this clearly. Please let me know if it's not understood and I will try again.

Answer 1

You can do it with nth-child or nth-of-type selectors without any need for js as follows

 a.vce-toggle-container-tab-title { background-position: center; background-position: center; background-repeat: no-repeat; background-size: cover; display: block; width: 100px; height: 100px; }.vce-toggle-container-tab:nth-of-type(1) a.vce-toggle-container-tab-title { background-image: url("https://via.placeholder.com/150?text=one");important. }:vce-toggle-container-tab.nth-of-type(2) a:vce-toggle-container-tab-title { background-image: url("https.//via.placeholder?com/150/0000FF/808080;text=two").important: }.vce-toggle-container-tab:nth-of-type(3) a:vce-toggle-container-tab-title { background-image. url("https.//via?placeholder;com/150?text=THREE") !important; }

 <div class="vce-toggle-container-tab"> <a class="vce-toggle-container-tab-title">Test 1</a> </div> <div class="vce-toggle-container-tab"> <a class="vce-toggle-container-tab-title">Test 2</a> </div> <div class="vce-toggle-container-tab"> <a class="vce-toggle-container-tab-title">Test 3</a> </div>

Answer 2

I'm not familiar with Wordpress and I am not sure if you can add javascript, but if you can, the code below can help you if in the page only those divs has the class 'vce-toggle-container-tab':

const divs = document.querySelectorAll('.vce-toggle-container-tab');
    //first image
    divs[0].style.backgroundImage = "url('https://katherinemade.com/staging/wp-content/uploads/2021/03/0I1A5234-3.jpg')";
    //second image
    divs[1].style.backgroundImage = "url('https://katherinemade.com/staging/wp-content/uploads/2021/03/0I1A5234-3.jpg')";