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This article will explain to you in detail about the use of jQuery, the editor thinks it is very practical, so share it with you for reference. I hope you can get something after reading this article.

The jQuery library provides a generic (cross-browser) abstraction layer for Web scripting, making it suitable for almost any scripting situation. JQuery usually provides us with the following functions:

1. Easy and quick access to DOM elements

If you use pure JavaScript to traverse DOM and find a part of DOM to write a lot of redundant code, using jQuery only needs one line of code to suffice. For example, to find all the P tags in all the div with the. content class style applied, all you need is the following line of code:

1 $('div.content'). Find (' p'); 2. Dynamically modify page styles

With jQuery we can dynamically modify the CSS of the page even after the page is rendered. JQuery can still change the class or individual style properties of a part of the document. For example, find the first li child tag of all the ul tags on the page, and then add a style named active to them, as follows:

1 $('ul > li:first'). AddClass ('active'); 3. Dynamically change DOM content

Using jQuery, we can easily modify the page DOM, for example, by adding a link to the element where ID is "container":

1 $('# container'). Append ('more'); 4. Respond to user interaction

JQuery provides an appropriate way to intercept a variety of page events, such as when a user clicks a link, without the need to use event handlers to break up HTML code. In addition, its event handling API eliminates the inconsistencies that often beset Web developers' browsers.

1 $('button.show-details') .click (function () {2 $(' div.details') .show (); 3})

The above code says: add a click event to the button element that uses the. show-details style, and the event is: display the DIV using the .details style.

5. Add dynamic effects to the page

A bunch of effects such as fading and erasing are built into jQuery, as well as toolkits for making new effects.

1 $(function () {2 $("# btnShow") .click (function () {3 $("# msubject") .hide ("slow"); 5}); 6. Unified Ajax operation

JQuery unifies the Ajax operation of a variety of browsers, making developers focus more on server-side development.

1 function (data, type) {2 / / A pair of raw data returned by Ajax is preprocessed 3 return data / / returns the processed data 4} 7. Simplify common JavaScript tasks.

In addition to these document-specific features, jQuery also improves on basic JavaScript data structures (such as iterations and array operations, etc.).

1 $.each (obj, function (key, value) {2 total + = value;3}); this is the end of the article on "what's the use of using jQuery". I hope the above content can be helpful to you so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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