:valid
input:valid {
background-color: #ddffdd;
}语法
:valid实例
这个例子提供了一个简单的表单，它在验证正确时将元素设为绿色，而当元素不满足时则为红色。
HTML
<form>
<label>Enter a URL:</label>
<input type="url" />
<br />
<br />
<label>Enter an email address:</label>
<input type="email" required/>
</form>CSS
input:invalid {
background-color: #ffdddd;
}
form:invalid {
border: 5px solid #ffdddd;
}
input:valid {
background-color: #ddffdd;
}
form:valid {
border: 5px solid #ddffdd;
}
input:required {
border-color: #800000;
border-width: 3px;
}
input:required:valid {
border-color: #008000;
}规范
Specification | Status | Comment |
|---|---|---|
HTML Living StandardThe definition of ':valid' in that specification. | Living Standard | No change |
HTML5The definition of ':valid' in that specification. | Recommendation | Defines the semantic regarding HTML and constraint validation. |
Selectors Level 4The definition of ':valid' in that specification. | Working Draft | Initial definition |
浏览器兼容性
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
Basic support (<input>) | 10.0 | 20 (12.10240) | 4.0 (2) | 10 | 10.0 | 5.0 |
Apply it to <form> | (Yes) | No support | 13 (13) | No support | (Yes) | ? |
Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
Basic support | ? | (Yes) | 4.0 (2) | No support | 10.0 | 5.0 |
Apply it to <form> | ? | No support | 13.0 (13) | No support | ? | ? |
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