The :invalid
CSS pseudo-class represents any <input>
or other <form>
element whose contents fail to validate.
/* Selects any invalid <input> */ input:invalid { background-color: pink; }
This pseudo-class is useful for highlighting field errors for the user.
:invalid
This example presents a simple form that colors elements green when they validate and red when they don't.
<form> <label for="url_input">Enter a URL:</label> <input type="url" id="url_input" /> <br /> <br /> <label for="email_input">Enter an email address:</label> <input type="email" id="email_input" required/> </form>
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:invalid { border-color: #C00000; }
The color red is commonly used to indicate invalid input. People who have certain types of color blindness will be unable to determine the input's state unless it is accompanied by an additional indicator that does not rely on color to convey meaning. Typically, descriptive text and/or an icon are used.
If any one of the radio buttons in a group is required
, the :invalid
pseudo-class is applied to all of them if none of the buttons in the group is selected. (Grouped radio buttons share the same value for their name
attribute.)
By default, Gecko does not apply a style to the :invalid
pseudo-class. However, it does apply a style (a red "glow" using the box-shadow
property) to the :-moz-ui-invalid
pseudo-class, which applies in a subset of cases for :invalid
.
You can disable the glow using the following CSS, or completely override it to alter the appearance of invalid fields:
:invalid { box-shadow: none; } :-moz-submit-invalid { box-shadow: none; } :-moz-ui-invalid { box-shadow: none; }
Specification | Status | Comment |
---|---|---|
HTML Living Standard The definition of ':invalid' in that specification. | Living Standard | No change. |
HTML5 The definition of ':invalid' in that specification. | Recommendation | Defines the semantics of HTML and constraint validation. |
Selectors Level 4 The definition of ':invalid' in that specification. | Working Draft | Initial definition. |
Desktop | ||||||
---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
Basic support | 10 | 12 | 4 | 10 | 10 | 5 |
Applies to <form> elements | Yes | No | 13 | No | Yes | ? |
Mobile | |||||||
---|---|---|---|---|---|---|---|
Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
Basic support | ? | ? | Yes | 4 | 10 | 5 | ? |
Applies to <form> elements | ? | ? | No | 14 | ? | ? | ? |
:required
, :optional
, :valid
:-moz-ui-invalid
, :-moz-submit-invalid
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/:invalid