Regarding the gradient of CSS3, currently the major browsers do not have good support, so we need to add the major browser prefixes when we use it.
-moz-: Browser using Mozilla core (Firefox browser)
-webkit-: Browsers using Webkit core (Chrome, Safari browsers)
-o-: Browser using Opera core (Opera browser)
I won’t introduce too much about IE here, and IE is not considered for the gradient of the background color in this article
One. linear-gradient
1.Syntax: -moz-linear-gradient(
Parameters: The first parameter is the direction of the linear gradient
top: from top to bottom;
left: from left to right;
right: from right to left;
bottom: from bottom to top;
It can also be combined in pairs, for example, from top left: left top, from top right: right top, etc., I won’t introduce too much here;
Angle represents an angle (I have always thought that a plane rectangular coordinate system involving angles is intuitive enough).
The second parameter and the third parameter are the colors of the starting point and the end point respectively. More parameters can be inserted between them to represent the gradient of multiple colors. The color supports hexadecimal numerical representation, or rgb can be used. (a) Numerical value
Example: background:-moz-linear-gradient(top,#000,#fff);
Note: Represents the gradient from #000 to #fff
Background:-moz-linear-gradient(45deg,#000 50%,#555 50%,#555);
Note: means 0-50% is #000, 50%-100% is #555
2.Grammar: -webkit-linear-gradient(
-webkit-gradient(
The new grammar writing rules are the same as others, so I won’t introduce them too much here. Here are the old grammar rules:
Parameter: The first parameter represents the gradient type, which can be linear (linear) or radial (radial);
The second parameter and the third parameter represent the starting point and end point of the gradient, which can be coordinates or key values;
The fourth and fifth parameters represent the color of the starting point and the end point respectively. More parameters can be inserted between them to represent the gradient of multiple colors. The color supports hexadecimal numerical representation, or rgb( a) numerical value.
Example: background:-webkit-gradient(linear,left top,left bottom,from(#fff),to(#000));
Note: Represents the gradient from top to bottom, from #fff to #000
Background:-webkit-gradient(linear,0 0,100% 100%,color-stop(.5,rgb(255,255,255)),color-stop(.5,rgba(0,0,0,.2)));
Note: It means that from the upper left to the lower right, 0-50% is white, and 50%-100% is black with a transparency of 0.2
3.Syntax: -o-linear-gradient(
Example: background:-moz-linear-gradient(top,#000,#fff);
Note: Represents the gradient from #000 to #fff
Two. Radial gradient (radial-gradient)
Syntax: -moz-radial-gradient(
-webkit-radial-gradient(
Oprea browser’s support for radial gradients is not very good yet, so I won’t introduce it here. In addition to the actual position, direction and color seen in linear gradients, radial gradients allow you to specify the shape of the gradient: circle and ellipse and the size: closest-side, closest -corner), farthest-side, farthest-corner, contain, cover. There is little difference between the settings of these sizes, which is a bit confusing.
Example: background:radial-gradient(#fff, #000);
background: -webkit-radial-gradient(#fff , #000);
Note: Represents a circular gradient from white to black
Background: -moz-radial-gradient(80% 20%, closest-corner, #fff, #000);
Background: -webkit-radial-gradient(80% 20%, closest-corner, #fff, #000);
Note: It means there is a gradient from white circle to black at 80% 20% position
2.css repeating gradient
Syntax: -moz-repeating-linear-gradient(
-webkit-repeating-linear-gradient(
-o-repeating-linear-gradient(
-moz-radial-gradient(
-webkit-radial-gradient(
Example: background: -moz-repeating-radial-gradient(#fff, #000 5px, #000 5px, #000 10px);
background: -webkit-repeating-radial-gradient(#fff, #000 5px, #000 5px, #fff 10px);
Note: It represents a circle of black and white circles (don’t be too dizzy)
This article is excerpted from Da Mo’s blog http://www.w3cplus.com/content/css3-gradient

The future trends of HTML are semantics and web components, the future trends of CSS are CSS-in-JS and CSSHoudini, and the future trends of JavaScript are WebAssembly and Serverless. 1. HTML semantics improve accessibility and SEO effects, and Web components improve development efficiency, but attention should be paid to browser compatibility. 2. CSS-in-JS enhances style management flexibility but may increase file size. CSSHoudini allows direct operation of CSS rendering. 3.WebAssembly optimizes browser application performance but has a steep learning curve, and Serverless simplifies development but requires optimization of cold start problems.

The roles of HTML, CSS and JavaScript in web development are: 1. HTML defines the web page structure, 2. CSS controls the web page style, and 3. JavaScript adds dynamic behavior. Together, they build the framework, aesthetics and interactivity of modern websites.

The future of HTML is full of infinite possibilities. 1) New features and standards will include more semantic tags and the popularity of WebComponents. 2) The web design trend will continue to develop towards responsive and accessible design. 3) Performance optimization will improve the user experience through responsive image loading and lazy loading technologies.

The roles of HTML, CSS and JavaScript in web development are: HTML is responsible for content structure, CSS is responsible for style, and JavaScript is responsible for dynamic behavior. 1. HTML defines the web page structure and content through tags to ensure semantics. 2. CSS controls the web page style through selectors and attributes to make it beautiful and easy to read. 3. JavaScript controls web page behavior through scripts to achieve dynamic and interactive functions.

HTMLisnotaprogramminglanguage;itisamarkuplanguage.1)HTMLstructuresandformatswebcontentusingtags.2)ItworkswithCSSforstylingandJavaScriptforinteractivity,enhancingwebdevelopment.

HTML is the cornerstone of building web page structure. 1. HTML defines the content structure and semantics, and uses, etc. tags. 2. Provide semantic markers, such as, etc., to improve SEO effect. 3. To realize user interaction through tags, pay attention to form verification. 4. Use advanced elements such as, combined with JavaScript to achieve dynamic effects. 5. Common errors include unclosed labels and unquoted attribute values, and verification tools are required. 6. Optimization strategies include reducing HTTP requests, compressing HTML, using semantic tags, etc.

HTML is a language used to build web pages, defining web page structure and content through tags and attributes. 1) HTML organizes document structure through tags, such as,. 2) The browser parses HTML to build the DOM and renders the web page. 3) New features of HTML5, such as, enhance multimedia functions. 4) Common errors include unclosed labels and unquoted attribute values. 5) Optimization suggestions include using semantic tags and reducing file size.

WebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.


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