For example, when we use checkbox, if we do like this: <div class="inline-control sign-up col-1"> <input type="checkbox" checked name="jLetter" id="jLetter"> Receive promotional offers? </div> When…
Sometime when some component is offscreen, but still get focus when we tab though the page. This can cause users' confusion. One easy to to find out the offscreen component is typing in your console, document.activeElement It will shows your the curr…
When you developing a complex component by your own, one thing you cannot ignore is Accessibility. Checkout this link. It lists all things you need to do regarding to accessibility when implements a complex component. The tech we are using is: Roving…
For a menu item, when we tab onto it, we want this element get 'focus' event, so that the submenu will show up. In the post, we will see how to achieve it by using JS+css, we will also see how to use 'nextElementSibling' to only focus the elemnt has…
You can make any element keyboard interactive with the HTML tabindex attribute. But you might need a little extra JavaScript and ARIA to support keyboards and screen readers. For more on using tabindex in practice, check out focus management lesson.…
第1章 网页的构造块 一个网页主要包括以下三个部分: n 文本内容(text content):在页面上让访问者了解页面内容的纯文字. n 对其他文件的引用(references to other files):我们使用这些引用来加载图像.音频.视频文件,以及样式表(控制页面的显示效果) 和JavaScript文件 (为页面添加行为).这些引用还可以指向其他的 HTML 页面和资源. n 标记(markup):对文本内容进行描述并确保引用正确地工作. 此…
4.1 组织文本 在已经采用结构化方式将页面划分为多个关键内容区域(content area)并添加相应的标题之后,就可以进一步对这些内容区域中的文本进行组织. 4.1.1 段落 p元素的具体功能是作为段落的一个容器.因此,请在段落的开始处使用P元素的开始标记<p>,在段落的结尾使用结束标记</p>. <div class="nurseryRhyme"> <p>Jack and Jill went up a hill</p>…
A few weeks ago, HTML5 became an official W3C Recommendation. I took advantage of this event to discuss 5 interesting but now obsolete featureson SitePoint. The problem is that the W3C specifications are only one side of the same coin. Starting from…
1.经常使用 插件工具 chrome插件: Mobile & Tablet Emulator(用于常见移动端适配):(重点) Mobile Emulator is an useful online tool to check the screen resolution on different mobile and tablet devices. Mobile Emulator is an useful online tool to check the screen resolution…
w3cshools MDN英文 MDN中文 HTML5 HTML5 is the latest evolution of the standard that defines HTML. The term represents two different concepts: It is a new version of the language HTML, with new elements, attributes, and behaviors, and a larger set of tec…
There's no question, HTML5 is a hot topic for developers. If you need a crash course to quickly understand the fundamentals of HTML5's functionality, you're in the right place. Editorial Note This article is in the Product Showcase section for our sp…
Abstract "HTML5 Differences from HTML4" describes the differences of the HTML5 specification from those of HTML4. Status of This Document This section describes the status of this document at the time of its publication. Other documents may supe…
