JavaScript errors usually occur when a plugin or theme executes some JavaScript code which has errors in the code. It can also occur if there is a conflict with a particular JavaScript library a theme or plugin is using. You should never use a theme or plugin that has JavaScript coding errors or violations in it.
All JavaScript code included in our plugin is error free (we always make sure of this). We understand the importance of developing plugins without adding any JavaScript errors. However, the same can’t be said for many 3rd party plugins or themes out there.
Your aim is to have a site without any JavaScript errors at all. This is the only way to ensure that all the plugins that you are using will work fine without conflicting with one another.
How to See If Your Site Has JavaScript Errors
All major browsers have a developer/debug option that allows you to check for JavaScript errors when the page loads. Here is how you can go to the developer console of your browser and see if you have JavaScript errors on your website:
- Press the F12 key (from your keyboard)
- Then click on the Console tab
- You can load the page again (while the console is open) to see any JavaScript errors.
The following example screenshot shows how JavaScript errors can look like. Any messages in “Red” means it is an error and it should be looked at.
How to Fix The JavaScript Errors
You need to fix all the JavaScript errors on your webpage. If you see an error on your webpage then you should investigate which plugin or theme is causing the error. You can do the following test to isolate the source of the error:
Test for plugin or theme conflict
Once you find the source, do one of the following to get it fixed:
- Contact the developer who’s theme or plugin has the coding error. This is something that really needs to be fixed in the code where it is broken.
- Alternatively, you could deactivate that plugin or theme and find an alternative that doesn’t have errors in it.