jquery end method

jQuery is a very popular JavaScript library that provides very powerful tools and functions for JavaScript developers. The biggest feature of jQuery is that it can easily create interactive and rich web pages and is compatible with various browsers. When using jQuery in our code, we often use some methods to control the behavior and effects of web pages. Among them, one of the most commonly used methods is jQuery's end method.

The end method is a set of jQuery methods used to end the operation of the currently selected element. The most commonly used of these methods is the end() method. This method is used to return to the previously selected element in the selector chain. The

end() method allows us to return to the previously selected element after operating on the current element. In jQuery selectors, we can use multiple methods in a chain to select multiple elements. However, when we need to return to the previously selected element after processing the last element in a piece of code, we need to use the end() method.

end()The end() method does not affect the previously selected element, but can return our previously selected element, so we can continue to use it in the selector chain. When we use the end() method, we can perform other operations before returning the currently selected element. In the following example, we first select the .example element, and then use the .first() method to select the first .example element. Next, we add an active class to the element using the .addClass("active") method, and then use the end() method to return to the previous selection Element (.example

element):

$('.example').first().addClass('active').end().css('border', '1px solid red');

In this example, we use the end()

method to return to the previously selected element and add A red border.

In addition to the end()

method, there are some other ending methods that can be used. The following are some commonly used end methods and their functions:

• addBack(): Combine the previous selector link and the current selector link to make it a new selection utensil chain. For example: $('.example').first().addClass('active').addBack().css('border', '1px solid red');
.
• andSelf(): Similar to addBack(). It can be used to merge the last selection with the current selector. For example: $('p').find('a').andSelf().addClass('active');
.
• prevObject(): Returns the previous object and does not affect the current selector. For example: $('.example').first().addClass('active').prevObject().css('border', '1px solid red');
.

In summary, end methods are useful for controlling the flow of code in chained calls. These methods can help us better control the execution logic of the code and avoid running unnecessary code. Therefore, when using jQuery, the end method is an important tool that we should understand and master. ###

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