Uncaught ReferenceError: jQuery is not defined | WordPress.org

Resolved rogeriodec
(@rogeriodec)

2 years, 6 months ago
I installed this code in footer, as suggested by https://www.scratchcode.io/how-to-add-back-button-in-elementor/, to use in my back button defined in my Elementor Single Post Page:
```
<script type="text/javascript"> 
 
jQuery(document).ready(function() {
    jQuery('#btn-back').on('click', function() {
      window.history.go(-1); 
      return false;
    });
});
 
</script>
```
`

It’s not working.

In Chrome’s console, I get:

(índice):443 Uncaught ReferenceError: jQuery is not defined
at (índice):443:1

How to fix this?

The page I need help with: [log in to see the link]

Viewing 2 replies - 1 through 2 (of 2 total)

Plugin Author SilkyPress
(@diana_burduja)

2 years, 6 months ago
Hello Roger,

on your website the jQuery library is loaded in the footer after the point at which at Simple Custom CSS & JS plugin can add the custom JS code. This is rather unusual, but it can happen in a certain theme/plugins configuration.

But, since your custom JS code is rather simple, you can also rewrite it into plain JavaScript that doesn’t require the jQuery library. For example, if you replace the entire JS code with the following:
```
document.getElementById("btn-back").onclick = function() {
    window.history.go(-1); 
    return false;
};
```
then the “back” button JS action should work alright.
Thread Starter rogeriodec
(@rogeriodec)

2 years, 6 months ago

At first, I replaced the previous code with your code in the footer, but it didn’t work.
Only later did I realize (as a layman) that the code needed to be between the <script> tags…
Now it works.
Thanks!

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Uncaught ReferenceError: jQuery is not defined’ is closed to new replies.

In: Plugins
2 replies
2 participants
Last reply from: rogeriodec
Last activity: 2 years, 6 months ago
Status: resolved