What is the difference between javascript and css

Difference: JavaScript represents web page behavior, and CSS represents web page performance. CSS is mainly used to beautify HTML pages and can perform static modifications on web pages; JavaScript is used to process various dynamic effects of pages and can be used to realize functions of web pages and human interaction, such as image replacement, scrolling, etc.

The operating environment of this tutorial: windows7 system, javascript1.8.5&&css3 version, Dell G3 computer.

CSS (Cascading Style Sheet) Cascading Style Sheet

Presentation - Design the presentation style of the web page, that is, "how to display relevant content"

CSS is a markup language that separates style information from web page content. We use CSS to define styles for each element; it is mainly used to beautify HTML pages.

The syntax is: selector {property: value} (selector {property: value}).

You can modify the display, position and other styles of each element in the HTML document by setting the corresponding style attributes; such as modifying the color, font, font size, width and height, position, background, etc.

JavaScript is a dynamic scripting language

Behavior (behavior)-controlling the behavior (effect) of a web page, that is, "how the content should react to events"

Using JavaScript code can Making the front desk interactive (click events) is often used to add a variety of dynamic functions to web pages to provide users with a smoother and more beautiful browsing effect. Usually JavaScript scripts realize their functions by embedding them in HTML.

The difference between javascript and css

CSS is the performance of the web page, and javascript is the behavior of the web page.

css statically modifies the web page so that the page can be displayed in a certain layout.

CSS is a markup language that separates style information from web page content. We use css to define styles for each element; it is mainly used to beautify HTML pages.

Javascript handles various dynamic effects on the page and can be used to realize the functions of interaction between the web page and people, such as replacing pictures, scrolling pictures, displaying and hiding layers, processing shortcut keys, etc. .

Commonly used functions of JavaScript:

1. Embed dynamic text in HTML pages

2. Respond to browser events

3. Read and write HTML elements

4. Verify data before the data is submitted to the server

5. Detect visitor’s browser information

6. Control cookies, including Creation and modification, etc.

[Recommended learning:javascript advanced tutorial]

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