W3cubDocs

/Web APIs

ValidityState: badInput property

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.

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

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/ValidityState/badInput