The read-only badInput property of a ValidityState object indicates if the user has provided input that the browser is unable to convert. For example, if you have a number input element whose content is a string.
ValidityState: badInput property
Value
A boolean.
Examples
html
<input type="number" id="age" />
js
const input = document.getElementById("age");
if (input.validity.badInput) {
console.log("Bad input detected…");
} else {
console.log("Content of input OK.");
}
Specifications
| Specification |
|---|
| HTML Standard # dom-validitystate-badinput-dev |
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
badInput |
25 | 12 | 29 | No | 15 | 7 | 4.4 | 25 | 64 | 14 | 7 | 1.5 |
See also
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https://developer.mozilla.org/en-US/docs/Web/API/ValidityState/badInput