CSS formatting
☆ Font, we can use css styles to set font, font size, color and other style attributes for the text in the web page. Let's take a look at an example. The following code implements: setting the font for the text in the web page to Song Dynasty.
body{font-family:"宋体";}
Be careful not to set uncommon fonts here, because if the font you set is not installed on the user's local computer, the browser's default font will be displayed. (Because whether the user can see the font style you set depends on whether the font you set is installed on the user's local computer.)
☆Font size and color, you can use the following code to set the font size of the text on the web page to 12 pixels , and set the font color to #666 (gray):
body{font-size:12px;color:#666}
☆Bold, we can also use css styles to change the style of the text : Bold, italic, underline, strikethrough, you can use the following code to set the text to be displayed in bold style.
p span{font-weight:bold;}
Here you can see that if you want to set boldness for text, there is a separate css style to achieve it. You no longer need to use h1 to achieve boldness. -h6 or strong tag.
☆Italic, the following code can realize the text to be displayed in italic style in the browser:
p a{font-style:italic;}
☆Underline, in some cases you want to The text is set to underline style, which can visually emphasize the text. You can use the following code to achieve this:
p a{text-decoration:underline;}
☆ Strikethrough, if you want to set it on the web page What to do with strikethrough? This style is often seen on e-commerce websites
. The strikethrough on the original price can be achieved using the following code:
.oldPrice{text-decoration:line-through;}
☆Indentation, in Chinese text, it is customary to leave two spaces before a paragraph. This special style can be achieved with the following code:
p{text-indent:2em;}
☆line Spacing (line height) plays an important role in paragraph layout. The following code sets the paragraph line spacing to 1.5 times.
p{line-height:1.5em;}
☆Character spacing, letter spacing, if you want to set text spacing or letter spacing in web page layout, you can use letter-spacing to achieve this, as shown in the following code :
h1{
letter-spacing:50px;
}
...
The Great Gatsby
Note: When this style is used in English words, it sets the spacing between letters.
☆Word spacing setting, what if I want to set the spacing between English words? This can be achieved using word-spacing. The following code:
h1{
word-spacing:50px;
}
...
welcome to YanHeng!
☆ Alignment, do you want to set a centering style for text and images in block elements? You can use text-align style code. The following code can achieve centered display of text.
h1{
text-align:center;
}
The Great Gatsby
Can also be set to the left:
h1 {
text-align:left;
}
The Great Gatsby
You can also set it to the right:
h1{
text- align:right;
}
The Great Gatsby
CSS box model
☆Element classification, Before explaining CSS layout, we need to know some knowledge in advance. In CSS, label elements in html are generally divided into three different types: block elements, inline elements (also called inline elements) and inline block element.
Commonly used block elements include:
,
..., ,
, , , , ,
- ,
- ,
- ,

The function of HTML is to define the structure and content of a web page, and its purpose is to provide a standardized way to display information. 1) HTML organizes various parts of the web page through tags and attributes, such as titles and paragraphs. 2) It supports the separation of content and performance and improves maintenance efficiency. 3) HTML is extensible, allowing custom tags to enhance SEO.

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.


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