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How to Upgrade Jquery to Latest Version in WordPress

In the rapidly evolving world of WordPress development, staying up to date with the latest technologies and security measures is crucial. One technology that plays a vital role in WordPress websites is jQuery.

Upgrading jQuery to the latest version not only enhances performance and interactivity but also ensures security by fixing bugs and vulnerabilities. However, upgrading jQuery in WordPress may be challenging, especially for older versions.

This article will guide you through two methods of upgrading jQuery in WordPress, allowing you to stay current while maintaining compatibility and a smooth transition.

Importance of Upgrading Jquery in WordPress

The importance of upgrading jQuery in WordPress cannot be overstated. WordPress websites, plugins, and themes heavily rely on JavaScript and jQuery to provide fast and interactive features.

Upgrading jQuery is crucial for maintaining the security of your website as it fixes bugs and vulnerabilities.

Older versions of WordPress may require manual jQuery updates, and replacing the default WordPress jQuery with Google Library does not automatically update to the latest version.

It is recommended to test the functionality of plugins after the update to ensure they are still compatible.

Determining Your Current Jquery Version

To determine your current jQuery version, you can utilize the JavaScript console in your web browser.

In Google Chrome, open the JavaScript console by selecting View » Developer » JavaScript Console.

Paste the command ‘jQuery.fn.jquery’ into the console to display the version.

If the version starts with 1.7 or lower, it indicates the need for an upgrade.

Ideally, you should have version 3.5.1 or higher for optimal performance and security.

Method 1 – Upgrading to the Latest Stable Version

Upgrading to the latest stable version of jQuery in WordPress can be done by utilizing Method 1. Here’s how to do it:

  • Install and activate the jQuery Updater plugin to update jQuery to the latest official stable version.
  • Clear browser cache and WordPress cache to see the changes.
  • The plugin includes the jQuery Migrate script for backward compatibility.

Testing Your Website After the Update

After upgrading jQuery to the latest version in WordPress, it is important to thoroughly test your website for any issues or conflicts. This step is crucial to ensure that all the functionalities of your website are working properly and that there are no compatibility issues with other plugins or themes.

Test different sections of your website, including forms, sliders, and interactive elements, to make sure everything is functioning as expected. It is recommended to perform this testing before making the updated version live to your audience.

Method 2 – Controlling the Version of Jquery

Continuing from the previous subtopic, users can gain control over the version of jQuery used on their WordPress website through the implementation of ‘Method 2 – Controlling the Version of jQuery.’

This method involves installing and activating the Version Control for jQuery plugin. Once activated, users can visit the Settings » jQuery Version Control page to select different jQuery and jQuery Migrate versions. By saving these changes, the selected versions will be applied to the website.

Selecting Different Jquery Versions

To select different versions of jQuery, users can utilize the Version Control for jQuery plugin and access the Settings » jQuery Version Control page.

This plugin allows users to choose from different jQuery and jQuery Migrate versions for their website. By visiting the settings page, users can select the desired versions and save the changes to apply them.

If any compatibility issues arise with older plugins, users can either select an earlier version or deactivate the plugin to revert to the original state.

Troubleshooting Issues With Older Plugins

One common challenge when upgrading jQuery in WordPress is troubleshooting issues with older plugins. These plugins may not be compatible with the latest version of jQuery, causing functionality problems or even breaking the website.

To help overcome this challenge, consider the following:

  • Disable or update incompatible plugins: Identify which plugins are causing issues and either disable them temporarily or update them to a version that is compatible with the upgraded jQuery.
  • Seek alternative plugins: In some cases, there may be alternative plugins available that offer similar functionality and are compatible with the latest version of jQuery.
  • Consult plugin developers or support forums: Reach out to the developers of the problematic plugins or seek assistance from WordPress support forums to find solutions or workarounds for compatibility issues.


In conclusion, upgrading jQuery in WordPress is crucial for enhancing website performance, interactivity, and security.

It is important to carefully consider the steps involved in the upgrade process to maintain backward compatibility and avoid breaking older plugin functionalities.

By following the methods outlined in this article, you can upgrade jQuery to the latest version while ensuring a smooth transition and staying up to date with the latest technologies.

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