


Please indicate the source when reprinting: The general trend HTML5 has become the technology that Web developers are most concerned about
Recently, a popular question has appeared on Stack Exchange: What are the biggest headaches for web developers? It turns out it's not about compatibility as everyone usually thinks, it's about HTML5.
Among all technologies related to front-end development, such as JavaScript, CSS3, HTML5, etc., which technical area is the most frequently discussed by web developers in private? Understanding this problem can better understand what challenges we are currently facing in the field of Web technology? To find out, the University of British Columbia conducted research on "questions commonly asked by web developers." They checked more than 500,000 technical questions related to JavaScript, HTML5, CSS and other Web-related questions on Stacke Exchange, analyzed the answers to these questions, and summarized which questions developers were most interested in and frequently asked. , summarizes the challenges that web developers currently face.
JavaScript is still king CSS and HTML5 are rapidly rising
Looking at the three most popular Web technologies (JavaScript, HTML5, CSS), JavaScript is still the topic that developers are most concerned about. But on Stack Exchange, the number of questions related to HTML5 and CSS is also rising rapidly. The researchers said: "In the future, they hope that the share of these topics will continue to rise."
Browser compatibility issues are getting fewer and fewer
The researchers found that cross-browser compatibility issues remain a popular topic, but the number of questions on the topic has dropped significantly over time (since 2009). This is mainly due to more and better JavaScript libraries, such as jQuery, and browser manufacturers' compliance with W3C standards.
The new features of HTML5 and JavaScript bring a lot of troubles to developers
On Stack Exchange, the number of questions about new features and elements of HTML5 and JavaScript (such as localStorage) has been relatively stable and is on the rise. Researchers say even expert-level programmers will be confused by the new features added to HTML5 and JavaScript, and they need better API support for these new features.
The importance of Web technology in the mobile field has become increasingly prominent
Finally, the researchers found that most of the questions about HTML5 since 2009 are mobile-related, such as device detection, local storage, etc., and the number of questions about CSS3's viewport meta tag is also increasing. These findings fully illustrate the more important role of Web technology in the mobile field. (Compiled by: Zhang Hongyue Editor: Xia Mengzhu)
The above is the general trend that HTML5 has become the technology that Web developers are most concerned about. For more related content, please pay attention to the PHP Chinese website (www.php.cn )!

html5的div元素默认一行不可以放两个。div是一个块级元素,一个元素会独占一行,两个div默认无法在同一行显示;但可以通过给div元素添加“display:inline;”样式,将其转为行内元素,就可以实现多个div在同一行显示了。

html5中列表和表格的区别:1、表格主要是用于显示数据的,而列表主要是用于给数据进行布局;2、表格是使用table标签配合tr、td、th等标签进行定义的,列表是利用li标签配合ol、ul等标签进行定义的。

固定方法:1、使用header标签定义文档头部内容,并添加“position:fixed;top:0;”样式让其固定不动;2、使用footer标签定义尾部内容,并添加“position: fixed;bottom: 0;”样式让其固定不动。

HTML5中画布标签是“<canvas>”。canvas标签用于图形的绘制,它只是一个矩形的图形容器,绘制图形必须通过脚本(通常是JavaScript)来完成;开发者可利用多种js方法来在canvas中绘制路径、盒、圆、字符以及添加图像等。

html5中不支持的标签有:1、acronym,用于定义首字母缩写,可用abbr替代;2、basefont,可利用css样式替代;3、applet,可用object替代;4、dir,定义目录列表,可用ul替代;5、big,定义大号文本等等。

html5废弃了dir列表标签。dir标签被用来定义目录列表,一般和li标签配合使用,在dir标签对中通过li标签来设置列表项,语法“<dir><li>列表项值</li>...</dir>”。HTML5已经不支持dir,可使用ul标签取代。

html5是指超文本标记语言(HTML)的第五次重大修改,即第5代HTML。HTML5是Web中核心语言HTML的规范,用户使用任何手段进行网页浏览时看到的内容原本都是HTML格式的,在浏览器中通过一些技术处理将其转换成为了可识别的信息。HTML5由不同的技术构成,其在互联网中得到了非常广泛的应用,提供更多增强网络应用的标准机。

3种取消方法:1、给td元素添加“border:none”无边框样式即可,语法“td{border:none}”。2、给td元素添加“border:0”样式,语法“td{border:0;}”,将td边框的宽度设置为0即可。3、给td元素添加“border:transparent”样式,语法“td{border:transparent;}”,将td边框的颜色设置为透明即可。


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