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This article mainly introduces the meaning of js and jquery. It has a certain reference value. Interested friends can refer to it. I hope you can learn a lot after reading this article. Let's take a look at it.

Js and jquery mean: 1, js is the abbreviation of JavaScript, is a frequently used web client scripting language, mainly used to add dynamic functions to HTML; 2, jquery is a set of cross-browser JavaScript library, used to simplify the operation between HTML and JavaScript.

The operating environment of this tutorial: windows10 system, jquery3.2.1 version, Dell G3 computer.

What do js and jquery mean?

1 、 js

Javascript (JS) is a scripting language used primarily for Web. It is used to enhance HTML pages and can usually be embedded in HTML code. JavaScript is an interpretive language. Therefore, it does not need to be compiled. JavaScript renders web pages in an interactive and dynamic manner. This allows the page to react to events, show special effects, accept variable text, validate data, create cookie, detect users' browsers, and so on.

In general, the html page is mainly used for static content display, but in practice, the page is rarely static, now the site will have some forms and slides, these are using js to interact, in fact, there are some languages can write scripts, are actually js.

Js is mainly developed with web, which can add a variety of dynamic effects to the website and make the web page more beautiful.

Characteristics of Javascript

1.js is object-oriented, and we can create objects and use existing ones.

2.js is a scripting language that can be executed without compilation and is run and interpreted directly.

3.js does not need any operating system, as long as it is supported by browsers, and supports multiple browsers at the same time.

4.js does not require any data types and adopts a weakly typed approach.

2 、 jquery

JQuery is a fast, small and feature-rich JavaScript library. Easy-to-use API (which can be used in a variety of browsers) makes it easier to traverse and manipulate HTML documents, event handling, animation, and Ajax.

JQuery is a tool library of JavaScript, which refers to the encapsulated JavaScript function, which can be called directly in the program. JQuery is a very popular JavaScript library. JQuery is designed to "write less code and do more". The jQuery library encapsulates the common functional code of JavaScript and provides a simple JavaScript design pattern to optimize HTML document operation, event handling, animation design and Ajax interaction.

Advantages of jQuery

Take up less space:

The reduced and compressed jQuery file has only 30KB.

Conforms to the CSS3 specification:

Support CSS3 selector to find elements and style attribute operations.

Cross-browser:

JQuery is compatible with a variety of mainstream browsers, such as IE, Chrome, Firefox, Safari, Opera and so on.

Characteristics of jQuery

Get document elements quickly

JQuery's selection mechanism is built on Css's selector, which provides the ability to quickly query elements in DOM documents and greatly strengthens the way page elements are retrieved in JavaScript.

Provide beautiful dynamic effects on the page

JQuery has a series of built-in animation effects to develop very beautiful web pages, and many websites use jQuery's built-in effects, such as fade in and out, element removal and other dynamic effects.

Create an AJAX web page without refresh

AJAX is the abbreviation of asynchronous JavaScript and XML, which can develop very sensitive web pages without refresh, especially when developing server-side web pages, such as PHP websites, need to communicate with the server back and forth, if you do not use AJAX, every data update has to refresh the web page, and after using AJAX special effects, the page can be partially refreshed to provide dynamic effects.

Provides enhancements to the JavaScript language

JQuery provides enhancements to basic JavaScript structures, such as element iteration and array processing.

Enhanced event handling

JQuery provides a variety of page events that prevent programmers from adding too much event handling code to HTML, and most importantly, its event handler eliminates various browser compatibility issues.

Change the content of a web page

JQuery can modify the content of a web page, such as changing the text of a web page, inserting or flipping a web page image, and jQuery simplifies the way it would have to be handled with JavaScript code.

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