Let's talk about some important knowledge points of jquery

jQuery is a popular JavaScript library that simplifies DOM manipulation, event handling, animation effects, AJAX, and other common JavaScript tasks. In order to better master and use jQuery, you first need to master some of its important knowledge points.

1. Selector
   jQuery selector is a syntax based on CSS selectors. It allows selecting elements by using CSS selectors, or by using jQuery's special selectors. Through selectors, you can get references to elements in HTML pages and perform various operations on them, such as modifying CSS properties, adding, removing, or updating elements, etc.
2. DOM Operation
   In jQuery, you can use various methods to access and manipulate DOM elements. For example, you can use the $() function to find the reference of an element, and perform various operations on it using methods such as addClass(), removeClass(), attr(), etc.
3. Event processing
   jQuery provides a wealth of event processing methods, such as click(), hover(), mousemove(), etc., which can easily bind and unbind various events for elements and make response. You can also use methods such as delegate() and on() to provide more flexible and advanced event processing functions.
4. Animation effects
   In jQuery, you can use the animate() method to achieve various animation effects, such as fade in and fade out, sliding, etc. You can create very smooth animations by transitioning an element's opacity or positional property from one value to another. At the same time, you can also easily set animation time, easing effects, etc.
5. AJAX
   jQuery can easily load HTML, XML or JSON data from the server and display them in the page by using AJAX technology. It provides some methods, such as $.get(), $.post(), etc., to quickly and conveniently execute AJAX requests, and use methods such as success() and error() to process the request results.
6. Plug-ins
   jQuery has a huge community and provides a series of powerful plug-ins, as well as various customizable options and extensions. These plug-ins can be used to write more efficient and complex applications, such as form validation, chart creation, image sliders, etc.

Summary
The above knowledge points are the core and most basic knowledge points in jQuery development. Learning these knowledge points well can effectively enhance your capabilities in jQuery development and lay a solid foundation for more complex application development in the future.

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