<strong>box-size<br /></strong>允许您以特定的方式定义匹配某个区域的特定元素。<br /><br />content-box(默认):宽度和高度分别应用到元素的内容框。在宽度和高度之外绘制元素的内边距和边框。<br />border-box:为元素设定的宽度和高度决定了元素的边框盒。<br />inherit:规定应从父元素继承 box-sizing 属性的值。
box-sizing:border-box;-moz-box-sizing:border-box; /* Firefox */-webkit-box-sizing:border-box; /* Safari */<br /><br />
<strong>-webkit-tap-highlight-color</strong><br />当用户点击iOS的Safari浏览器中的链接或JavaScript的可点击的元素时,覆盖显示的高亮颜色。<br /><br />color:颜色值(默认inherit)<br />transparent:透明值
<br /><strong>-webkit-font-smoothing</strong><br />使页面上的字体抗锯齿,使用后字体看起来会更清晰舒服。<br /><br />none:对低像素的文本比较好 <br />subpixel-antialiased:默认值<br />antialiased:抗锯齿很好 <br /><br /><strong>解决字体图标锯齿问题</strong><br />-webkit-font-smoothing: antialiased;<br />-moz-osx-font-smoothing: grayscale;<br /><br />
<strong>多栏多列布局</strong>
父元素:<br />display: -webkit-flex;<br />-webkit-flex-flow: row;-webkit-align-items: stretch;-webkit-justify-content:space-between; /*IE10还不支持*/display: -ms-flex;-ms-flex-flow: row wrap;-ms-align-items: stretch;-ms-justify-content:space-between; display: flex;flex-flow: row;align-items: stretch;justify-content:space-between;
flex-flow:row 伸缩项目排列由左向右排列<br /> column 伸缩项目排列由上至下排列
align-items:flex-start 弹性盒子元素的侧轴(纵轴)起始位置的边界紧靠住该行的侧轴起始边界。<br /> flex-end 弹性盒子元素的侧轴(纵轴)起始位置的边界紧靠住该行的侧轴结束边界。<br /> center 弹性盒子元素在该行的侧轴(纵轴)上居中放置。(如果该行的尺寸小于弹性盒子元素的尺寸,则会向两个方向溢出相同的长度)。<br /> baseline 如弹性盒子元素的行内轴与侧轴为同一条,则该值与'flex-start'等效。其它情况下,该值将参与基线对齐。<br /> stretch 如果指定侧轴大小的属性值为'auto',则其值会使项目的边距盒的尺寸尽可能接近所在行的尺寸,但同时会遵照'min/max-width/height'属性的限制。
justify-content:flex-start (默认值)项目位于容器的开头。 <br /> flex-end 项目位于容器的结尾。<br /> center 项目位于容器的中心。 <br /> space-between 项目位于各行之间留有空白的容器内。 <br /> space-around 项目位于各行之前、之间、之后都留有空白的容器内。 <br /> initial 设置该属性为它的默认值。<br /> inherit 从父元素继承该属性。<br /><br />子元素
flex<br />相对于同一容器其他灵活的项目,规定项目的长度。<br />语法<br />flex: flex-grow flex-shrink flex-basis|auto|initial|inherit;<br />flex:flex-grow 一个数字,规定项目将相对于其他灵活的项目进行扩展的量。 <br /> flex-shrink 一个数字,规定项目将相对于其他灵活的项目进行收缩的量。<br /> flex-basis 项目的长度。合法值:"auto"、"inherit" 或一个后跟 "%"、"px"、"em" 或任何其他长度单位的数字。<br /> auto 与 1 1 auto 相同。<br /> none 与 0 0 auto 相同。<br /> initial 设置该属性为它的默认值,即为 0 1 auto。<br /> inherit 从父元素继承该属性
-webkit-flex:1;<br />-moz-flex:1;<br />flex:1;<br /><br /><strong>text-transform</strong><br />控制文本的大小写。<br />none 默认。定义带有小写字母和大写字母的标准的文本。<br />capitalize 文本中的每个单词以大写字母开头。<br />uppercase 定义仅有大写字母。<br />lowercase 定义无大写字母,仅有小写字母。<br />inherit 规定应该从父元素继承 text-transform 属性的值。
<br />white-space <br />属性设置如何处理元素内的空白。<br />normal 默认。空白会被浏览器忽略。<br />pre 空白会被浏览器保留。其行为方式类似 HTML 中的 <pre class="brush:php;toolbar:false"> 标签。 <br />nowrap 文本不会换行,文本会在在同一行上继续,直到遇到 <br> 标签为止。 <br />pre-wrap 保留空白符序列,但是正常地进行换行。 <br />pre-line 合并空白符序列,但是保留换行符。<br />inherit 规定应该从父元素继承 white-space 属性的值。

Self-closingtagsinHTMLandXMLaretagsthatclosethemselveswithoutneedingaseparateclosingtag,simplifyingmarkupstructureandenhancingcodingefficiency.1)TheyareessentialinXMLforelementswithoutcontent,ensuringwell-formeddocuments.2)InHTML5,usageisflexiblebutr

To build a website with powerful functions and good user experience, HTML alone is not enough. The following technology is also required: JavaScript gives web page dynamic and interactiveness, and real-time changes are achieved by operating DOM. CSS is responsible for the style and layout of the web page to improve aesthetics and user experience. Modern frameworks and libraries such as React, Vue.js and Angular improve development efficiency and code organization structure.

Boolean attributes are special attributes in HTML that are activated without a value. 1. The Boolean attribute controls the behavior of the element by whether it exists or not, such as disabled disable the input box. 2.Their working principle is to change element behavior according to the existence of attributes when the browser parses. 3. The basic usage is to directly add attributes, and the advanced usage can be dynamically controlled through JavaScript. 4. Common mistakes are mistakenly thinking that values need to be set, and the correct writing method should be concise. 5. The best practice is to keep the code concise and use Boolean properties reasonably to optimize web page performance and user experience.

HTML code can be cleaner with online validators, integrated tools and automated processes. 1) Use W3CMarkupValidationService to verify HTML code online. 2) Install and configure HTMLHint extension in VisualStudioCode for real-time verification. 3) Use HTMLTidy to automatically verify and clean HTML files in the construction process.

HTML, CSS and JavaScript are the core technologies for building modern web pages: 1. HTML defines the web page structure, 2. CSS is responsible for the appearance of the web page, 3. JavaScript provides web page dynamics and interactivity, and they work together to create a website with a good user experience.

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.


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