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Is it necessary to add jQuery to WordPress?
Since WordPress version 2.x, jQuery is a build-in Javascript library, explicitly include the jQuery library into WordPress is not necessary. The jQuery is not working in WordPress plug-in writing?
Why is my jQuery function not working in WordPress?
In WordPress, the $ () syntax is always used by other scripting library, and causing the conflict issue and fail to call the jQuery function. You should use jQuery () instead…
Why is jQuery migrate not enabled in WordPress 5.5?
“With the update to WordPress 5.5, a migration tool known as jquery-migrate will no longer be enabled by default. This may lead to unexpected behaviors in some themes or plugins who run older code.”
Why is jQuery not defined when not using WP _ editor?
It turned out that the option name I was using had a dot in the name (my_plugin_name_customer.subscription.updated) and it was breaking the editor. I replaced the dot with underscore and it fixed my problem.
What’s the problem with jQuery in WordPress 5.5?
The first step of the process of modernizing WordPress was removing the jQuery Migrate 1.x in WordPress 5.5. And that’s what is causing some sites to break. Some WordPress themes and plugins are using older jQuery scripts, which is causing a range of problems.
Is there a way to restore the jQuery library in WordPress?
WordPress has released a plugin that restores the jQuery Migrate library. Installing this plugin will cause your site to work again. But… The plugin does not actually fix what is wrong with your site. What the plugin does is makes your site work again. But it does not fix what is wrong with the site.
How to check if jQuery is not defined in WordPress?
You can check it by viewing the source code. And make sure your javascript file is loaded after the jQuery load otherwise it will generate the same Uncaught ReferenceError: jQuery is not defined or Uncaught ReferenceError: $ is not defined.