JSFiddle - React, Tailwind, and code Playground

HTML

<div class=" kat-col-xs-12 kat-col-sm-7"><div class="kat-row  "><div class=" kat-col-xs-8"><div class="kat-row kat-row-padding-bottom  uploading-image-section"><div><input multiple="" type="file" accept=".JPEG,.jpeg,.JPG,.PNG,.png,.gif,.tif,.tiff,.photostudio,.webp" style="display: none;"><a><kat-icon name="add_circle_outline" size="small"></kat-icon><kat-label class="image-upload-guideline" variant="default"><span>Upload multiple files</span><span slot="private-light-dom"><label>Upload multiple files</label></span></kat-label></a><kat-label class="left-padding-10 image-upload-guideline" variant="default"><span>or drag and drop 1 or more files below.</span><span slot="private-light-dom"><label>or drag and drop 1 or more files below.</label></span></kat-label></div><div class="image-upload-result-message"><span>Uploaded: 0 of 9 images. Maximum 9 images are allowed. You can arrange the order after uploading.</span></div></div></div><div class=" kat-col-xs-4"><kat-link label="Product images style guideline" href="/gp/help/help.html?itemID=1881&amp;ref_=ag_1881_cont_img" id="imageRequirementLink" variant="link" target="_blank"></kat-link></div></div><div id="image-contribution-grid" class="NmbTY7t5Lt9iUP4IJy0i"><div class="uP74h0hWZUzbcqM1doHG IazVbeuKn6e3j5HwOjS7 newImgCreate"><section class="img-section"><div><div id="ProductImage_MAIN" class="image-upload-component"><div id="ProductImage_MAIN-input-droptarget"><input type="file" id="ProductImage_MAIN-input_input" accept="image/JPEG,image/jpeg,image/JPG,image/PNG,image/png,image/gif,image/tif,image/tiff,image/photostudio,image/webp" style="display: none;"></div><div id="ProductImage_MAIN-display" class="image-invalid-component" draggable="false"><div class="upload-image "><div class="image-upload-center"><kat-icon name="add_a_photo" size="large"></kat-icon><div><label for="ProductImage_MAIN-input_input"><span>Upload</span></label></div></div></div><div draggable="false" class="hide"><div...

JavaScript

setTimeout(function() {
  // Sélectionner tous les éléments avec la classe 'uP74h0hWZUzbcqM1doHG IazVbeuKn6e3j5HwOjS7 newImgCreate'
  let elements = document.querySelectorAll('.uP74h0hWZUzbcqM1doHG.IazVbeuKn6e3j5HwOjS7.newImgCreate');
  
  if (elements.length >= 3) {
    // Sélectionner le 3ème élément dans la liste (index 2)
    let thirdElement = elements[2];
    
    // Chercher un enfant cliquable à l'intérieur (comme un bouton ou icône)
    let clickableChild = thirdElement.querySelector('kat-icon[name="add_a_photo"]') || thirdElement.querySelector('button, input, [role="button"]');
    
    if (clickableChild) {
      clickableChild.click();  // Simuler un clic sur l'élément enfant cliquable
      console.log('Clic simulé sur un élément enfant cliquable du 3ème élément');
    } else {
      console.log('Aucun enfant cliquable trouvé dans le 3ème élément');
    }
  } else {
    console.log('Moins de 3 éléments trouvés');
  }
}, 1000);