jQuery andSelf() method

As of my last update in September 2021, the andSelf() method in jQuery has been deprecated since version 1.8 and removed in version 3.0. Therefore, it is no longer available in the latest versions of jQuery.

The purpose of the andSelf() method was to add the previous set of elements in the jQuery object to the current set. It was used to include both the original set of elements and the elements from the previous step in the method chaining.

For example:

$(selector1)
  .find(selector2)
  .andSelf() // Deprecated, no longer supported
  .addClass("highlight");

In the above code, the andSelf() method would have added the elements selected by selector1 back to the jQuery object so that the addClass("highlight") method is applied to both the elements selected by selector1 and the elements matched by selector2.

Since the andSelf() method is deprecated and removed, you can achieve the same result by using the addBack() method, which was introduced to replace andSelf():

$(selector1)
  .find(selector2)
  .addBack() // Use addBack() instead of andSelf()
  .addClass("highlight");

The addBack() method serves the same purpose as andSelf() but in a more intuitive and consistent way. It includes the previous set of elements in the current jQuery object, making the method chain easier to understand and maintain.

Remember that if you are using a version of jQuery older than 3.0, andSelf() might still work, but it is recommended to update your code to use addBack() for compatibility with newer versions and to follow the best practices.