This article brings you an introduction to the css3 selectors: read-write and: read-only. How to use it, let everyone know what the :read-write selector and :read-only selector of CSS3 are, what they do, and how to use them. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
css3 :read-write
:read-write is a pseudo-class selector in CSS, which is used to match user-editable elements, that is, readable and writable elements.
Elements belonging to the editable category include:
1. elements (of any type) that are not read-only and not disabled. This means that they have neither the readonly nor the disabled attribute set.
2. A
3. Any other element that is not or
Note: Currently, in most browsers, the :read-write selector can only be used to set input and textarea elements.
css3 :read-only
:read-only is also a pseudo-class selector in CSS, matching anything that does not match the :read-write selector element.
In other words, the :read-only pseudo-class selector matches elements that cannot be edited by the user, that is, it matches any element that is not editable above ↑. For example: elements with attributes such as readonly or disabled set.
The following are examples of elements that can be matched using: read-write:
< input type = “text” > < input type = “number” > < textarea name = “nm” id = “id” cols = “30” rows = “10” > </ textarea > < div class = “random” contenteditable > </ div >
The following are examples of elements that cannot be matched using: read-write, that is, examples of elements that can be matched using: read-only :
< input type = “text” disabled > < input type = “number” disabled > < input type = “number” readonly > < textarea name = “nm” id = “id” cols = “30” rows = “10” readonly > </ textarea > < div class = “random” > </ div > <! - 无法使用contenteditable编辑的常规元素 - >
Although this is the behavior recommended by the specification, browser behavior appears to vary: what may be considered read and write in one browser will be considered read and written in another browser. Read-only, so the :read-write style we apply may not work with some browsers.
Like other pseudo-class selectors, both the :read-write selector and the :read-only selector can be linked with other selectors, such as :hover and the pseudo-element ::after.
For example, :read-write :focus will provide the style for the editable text area:
textarea:read-write:focus { box-shadow: 0 0 2px 1px rgba(0,0,0,0.2); } textarea:read-write:before { content: "Type here..."; color: #aaa; }
For example, :read-only :hover will provide the style for the div (regular) on the page:
div:read-only:hover { background-color: #eee; } div:read-only:before { content: "?"; color: deepPink; }
Browser support
The number in the table indicates the first browser version number that supports this attribute.
In Firefox browser, use the prefix: -moz-read-write, -moz-read-only; and the read-write selector and read-only selector are not supported on Internet Explorer and Android use.
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