--- title: ':in-range' slug: 'Web/CSS/:in-range' translation_of: 'Web/CSS/:in-range' ---
in-range CSS 伪类 代表一个 {{htmlelement("input")}} 元素,其当前值处于属性{{htmlattrxref("min", "input")}} 和{{htmlattrxref("max","input")}} 限定的范围之内./* 该伪类可选定任意的<input>, 但只有在该元素指定了取值范围,并且元素值处于指定范围时才有效*/
input:in-range {
background-color: rgba(0, 255, 0, 0.25);
}
该伪类用于给用户一个可视化的提示,表示输入域的当前值处于允许范围内。
<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">
<label for="value1">Your value is </label>
</li>
</ul>
</form>
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!';
}
| 规范 | 状态 | 备注 |
|---|---|---|
| {{SpecName('HTML WHATWG', 'scripting.html#selector-in-range', ':in-range')}} | {{Spec2('HTML WHATWG')}} | Defines when :in-range matches elements in HTML. |
| {{SpecName('CSS4 Selectors', '#in-range-pseudo', ':in-range')}} | {{Spec2('CSS4 Selectors')}} | Initial specification. |
{{Compat("css.selectors.in-range")}}