Fancybox报错：Cannot read 'find' of undefined 求助（附画廊视图代码）

Hey there, let's work through this Fancybox error you're running into: Cannot read 'find' of undefined. This issue almost always happens when Fancybox can't properly locate or interact with the elements it needs to run—here's how to fix it step by step:

1. Fix Your Incomplete HTML First #

Looking at your code snippet, the <img> tag and some attributes are cut off mid-way:

<img alt="Exterior" src="https://*******.s3.amazonaws.com/hotelpictures/003/623/222/LON-91B-1.jpg?1387213390" width="250" height="250" class="big_thumb" style="left: 0px; top: -25p..."

Broken HTML can mess up how the browser parses the DOM, making Fancybox unable to target the element correctly. Let's clean that up:

<div class="image_wrap">
  <a class="fancybox_43566 thumb_a" href="https://******.s3.amazonaws.com/hotelpictures/003/623/222/LON-91B-1.jpg?1387213390">
    <div class="image">
      <div class="resize-and-crop" style="width: 250px; height: 200px;">
        <img alt="Exterior" src="https://*******.s3.amazonaws.com/hotelpictures/003/623/222/LON-91B-1.jpg?1387213390" width="250" height="250" class="big_thumb" style="left: 0px; top: -25px;">
      </div>
    </div>
  </a>
</div>

2. Make Sure Fancybox Initializes After the DOM is Ready #

Fancybox can't find elements that haven't finished loading into the page yet. Wrap your initialization code in a DOM-ready handler to avoid this:

For jQuery (older Fancybox versions): #

$(document).ready(function() {
  $('.fancybox_43566').fancybox();
});

For vanilla JS (Fancybox 3+): #

document.addEventListener('DOMContentLoaded', function() {
  Fancybox.bind('.fancybox_43566', {
    // Add your custom Fancybox options here if needed
  });
});

3. Verify Your Selector and Element Existence #

Double-check these two things:

• The class fancybox_43566 is correctly spelled on your <a> tag (no typos!)
• The element exists in the DOM when Fancybox runs. If you're loading the gallery dynamically (like via AJAX), you need to initialize Fancybox after the elements are added to the page.

4. Check Fancybox Version Compatibility #

If you're using a newer Fancybox version (v3+), the old jQuery-style initialization ($().fancybox()) won't work. Make sure you're using the syntax matching your version—stick to the initialization method outlined in your Fancybox version's docs.

Give these steps a go, and your gallery should start working without that error!

内容的提问来源于stack exchange，提问作者Silco