:in-range
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since November 2015.
尝试一下
label { display: block; margin-top: 1em; } input:in-range { background-color: palegreen; } <form> <label for="amount">How many tickets? (You can buy 2-6 tickets)</label> <input id="amount" name="amount" type="number" min="2" max="6" value="4" /> <label for="dep">Departure Date: (Whole year 2022 is acceptable)</label> <input id="dep" name="dep" type="date" min="2022-01-01" max="2022-12-31" value="2025-05-05" /> <label for="ret">Return Date: (Whole year 2022 is acceptable)</label> <input id="ret" name="ret" type="date" min="2022-01-01" max="2022-12-31" /> </form> 这个伪类很有用，可以给用户提供一个视觉提示，让他们知道字段的当前值是否在允许的范围内。
备注： 该伪类仅适用于具有（且可以接受）范围限制的元素。如果没有这样的限制，元素值就无所谓“in-range”和“out-of-range”。
语法
css
:in-range { /* ... */ } 示例
HTML
html
<form action="" id="form1"> <ul> Values between 1 and 10 are valid. <li> <input id="value1" name="value1" type="number" placeholder="1 to 10" min="1" max="10" value="12" required /> <label for="value1">Your value is </label> </li> </ul> </form> CSS
css
li { list-style: none; margin-bottom: 1em; } input { border: 1px solid black; } input:in-range { background-color: rgba(0, 255, 0, 0.25); } input:out-of-range { background-color: rgba(255, 0, 0, 0.25); border: 2px solid red; } input:in-range + label::after { content: "okay."; } input:out-of-range + label::after { content: "out of range!"; } 结果
规范
| Specification |
|---|
| HTML # selector-in-range |
| Selectors Level 4 # in-range-pseudo |