What is jQuery Migration ?
jQuery Migration is a JavaScript library designed to expand the abilities of existing jQuery web applications. This library allows developers to upgrade existing web applications to use newer versions of jQuery while keeping backward compatibility with older versions. jQuery Migration is included as part of the jQuery download package, and is released under the MIT License.
Why Is jQuery Migration Needed?
There are many reasons why jQuery Migration is needed in order to bring existing web applications up to date. As with any programming language, there are continual updates that can keep your application running smoothly and with improved features, but unfortunately, not every update is backwards compatible with existing code. The goal of jQuery Migration is to help developers respond quickly to changes in jQuery, to ease migration for tested applications, and to promote and maintain the sustainability of code.
What Does jQuery Migration Provide?
jQuery Migration provides the following features:
- Improved backwards compatibility: jQuery Migration provides a library of patches designed to help bring existing code forward with minimal disruption.
- Improved security: By making sure that your code is up-to-date, you can avoid any potential security vulnerabilities.
- Up-to-date code: jQuery Migration helps ensure your application is using the most up-to-date jQuery code available.
How to Use jQuery Migration
Using jQuery Migration is relatively straightforward – simply include the jQuery-migrate.min.js
script in your page’s section. This script will then scan your page and inform you of any version-specific issues that need to be addressed.
To get the most out of jQuery Migration, look for the blue ‘Migrator’ box that appears in the Javascript console – this contains an outline of any changes you need to make to bring your code into line with a newer version of jQuery. It’s also important to keep in mind that using jQuery Migration simply ensures compatibility; if you want to make the most of a new version of jQuery, you should still manually update your code.
In summary, jQuery Migration is an important tool for keeping your code up to date and running smoothly. By following the instructions outlined above, you’ll be able to take advantage of the latest and greatest jQuery has to offer.

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