: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 2015年11月.
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 |
浏览器兼容性
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