用:focus-within 实现纯 CSS 下拉框组件 :focus-within伪类:当本节点或其子节点获得焦点时被激活。 借用MDN 的例子 https://jsfiddle.net/d4w8h2ge/ 当点击表单中的文本框时需高亮整个表单元素。但是表单内部的文本框获得焦点并不代表表单元素本身有焦点,所以使用form:focus并不能生效,这时就可以使用:focus-wit...
focus - 《HTML&CSS》 175播放 form元素 - 《HTML&CSS》 243播放 文本域&下拉列表 - 《HTML&CSS》 271播放 按钮- 《HTML&CSS》 410播放 多选框 - 《HTML&CSS》 411播放 单选框 - 《HTML&CSS》 415播放 单行文本输入框 - 《HTML&CSS》 394播放 iframe元素 - 《HTML&CSS》 408播放 video元素 - 《HT...
示例一 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>:focus</title> <style> *{ margin: 0; padding: 0; } input:focus{ background: #cbcbcb; } </style> </head> <body> <input type="text"/> </body> </html> 1. 2. 3. 4. 5. 6. 7. 8. 9....
we must ensure their focus is not dropped as content is deleted or shown in new contexts. Skip links also provide a way for users to get past a lot of content. In this lesson, you'll learn HTML, CSS and JavaScript techniques for focus management...
String that specifies one or more Cascading Style Sheets (CSS) attribute/value pairs.RemarksIn an HTML document, an element must receive focus from the user in order to become active and perform its tasks. For example, users must set input focus on a link in order to follow it. Similarly...
<html> <head> <style type="text/css"> a:link { background: blue; color: white; } a:visited { background: crimson; color: pink; } a:hover { background: black; color: white; } a:active { background: red; color: white; } a:focus { background: gray; color: white; } </...
What is the issue with the HTML Standard? The CSS Working Group has resolved to add the new reading-flow property (w3c/csswg-drafts#8589,spec) to enable focus navigation in visual order for layout items that might not be displayed in source order (such as grid, flex and masonry items)....
CSS伪类用于向某些选择器添加特殊的效果。CSS又名层叠样式表,所谓层叠,就是后面的样式会覆盖前面的样式,所以在样式表中,各样式排列的顺序很有讲究。 :link 与 :visited 在样式文件中的顺序可以随便放置。 :focus,: hover,:active这几个,如果你设置的顺序不同,会直接影响样式的显示效果。
// (focus and blur are always synchronous in other supported browsers, // this just defines when we can count on it). function expectSync( elem, type ) { return ( elem === document.activeElement ) === ( type === "focus" ); } function on( elem, types, selector, data, fn, one...
DOCTYPEhtml><html><head><meta charset="UTF-8"><title>鼠标点击<input>输入域后出现有颜色的边框</title><style type="text/css">*{margin:0;padding:0;}.main{margin:50px auto;width:400px;}.inp{width:200px;height:30px;}.inp:focus{outline:none;border:1px solid #CCCCCC;background:#f0ec...