What is the use of jQuery filter?

The filter method in the jQuery returns certain elements that match the specified criteria. You can specify a criterion with the filter method and apply it to DOM elements. It removes the elements that do not match the specified criteria and allows only that matches. It works like a search function.

Syntax

$(selector).filter(criteria,function(index)) 

Here the criteria specify an expression that you want to apply to the DOM elements for filtering. You can specify multiple criteria separated by a comma. The function is optional that runs on each specified element. It returns true if the element matches the criteria or false otherwise.