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in-range CSS 伪类 代表一个 <input> 元素,其当前值处于属性minmax 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。

注意:该伪类仅适用于那些拥有(或可以接受)取值范围设定的元素。若缺少此类设定,元素值就无所谓“in-range”和“out-range”。

语法

:in-range

示例

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">
      <label for="value1">Your value is </label>
    </li>
  </ul>
</form>

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

规范 状态 备注
HTML Living Standard
:in-range
Living Standard Defines when :in-range matches elements in HTML.
Selectors Level 4
:in-range
Working Draft Initial specification.

浏览器兼容性

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support102 Yes293 No114 Yes5
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support2.31 ? Yes16 Yes4 Yes5 ?

1. Before version 52, :in-range matched disabled and read-only inputs (see Chromium bug 602568). In version 52, it was changed to only match enabled read-write inputs.

2. Before Chrome 52, :in-range matched disabled and read-only inputs (see Chromium bug 602568). In Chrome 52, it was changed to only match enabled read-write inputs.

3. Before Firefox 50, :in-range matched disabled and read-only inputs (see bug 1264157). In Firefox 50, it was changed to only match enabled read-write inputs.

4. Before Opera 39, :in-range matched disabled and read-only inputs (see Chromium bug 602568). In Opera 39, it was changed to only match enabled read-write inputs.

5. In Safari, :in-range matched disabled and read-only inputs (see bug 156530). It was later changed to only match enabled read-write inputs.

参考

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