columns语法:columns:[ column-width ] || [ column-count ]
设置或检索对象的列数和每列的宽度
其中:[ column-width ]:设置或检索对象每列的宽度;[ column-count ]:设置或检索对象的列数。
css代码:
body{font:14px/1.5 georgia,serif,sans-serif;}p{margin:0;padding:5px 10px;background:#eee;}h1{margin:10px 0;font-size:16px;}.test{ width:628px; border:10px solid #000; -moz-columns:200px 3; -webkit-columns:200px 3; columns:200px 3;}.test2{ border:10px solid #000; -moz-columns:200px; -webkit-columns:200px; columns:200px;}
html代码:
<h1 id="列数及列宽固定">列数及列宽固定:</h1><div class="test"> <p>This module describes multi-column layout in CSS. By using functionality described in this document, style sheets can declare that the content of an element is to be laid out in multiple columns. </p> <p>On the Web, tables have also been used to describe multi-column layouts. The main benefit of using CSS-based columns is flexibility; content can flow from one column to another, and the number of columns can vary depending on the size of the viewport. Removing presentation table markup from documents allows them to more easily be presented on various output devices including speech synthesizers and small mobile devices.</p></div><h1 id="列宽固定-根据容器宽度液态分布列数">列宽固定,根据容器宽度液态分布列数:</h1><div class="test2"> <p>This module describes multi-column layout in CSS. By using functionality described in this document, style sheets can declare that the content of an element is to be laid out in multiple columns. </p> <p>On the Web, tables have also been used to describe multi-column layouts. The main benefit of using CSS-based columns is flexibility; content can flow from one column to another, and the number of columns can vary depending on the size of the viewport. Removing presentation table markup from documents allows them to more easily be presented on various output devices including speech synthesizers and small mobile devices.</p></div>
结果如图所示:
以下列出column运用的相关属性
1.column-width:
如:-moz-column-width:200px;
2.column-count:
如:-webkit-column-count:3;
3.column-gap:
如:column-gap:normal;column-gap:40px;
4.column-rule:[ column-rule-width ] || [ column-rule-style ] || [ column-rule-color ]设置或检索对象的列与列之间的边框。复合属性。相当于border属性
如:column-rule:10px solid #090;
5.column-span:none | all 设置或检索对象元素是否横跨所有列。
如:column-span:all;
6.column-fill:auto | balance 设置或检索对象所有列的高度是否统一。
auto:列高度自适应内容
balance:所有列的高度以其中最高的一列统一
如:column-fill:balance;
7.column-break-before:auto | always | avoid | left | right | page | column | avoid-page | avoid-column 设置或检索对象之前是否断行。
auto:既不强迫也不禁止在元素之前断行并产生新列
always:总是在元素之前断行并产生新列
avoid:避免在元素之前断行并产生新列
8.column-break-after:auto | always | avoid | left | right | page | column | avoid-page | avoid-column 设置或检索对象之后是否断行。
auto:既不强迫也不禁止在元素之后断行并产生新列
always:总是在元素之后断行并产生新列
avoid:避免在元素之后断行并产生新列
9.column-break-inside:auto | avoid | avoid-page | avoid-column 设置或检索对象内部是否断行。
auto:既不强迫也不禁止在元素内部断行并产生新列
avoid:避免在元素内部断行并产生新列
其实常用的也就前面5条。

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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