ValidityState: badInput property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since December 2018.

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

BCD tables only load in the browser

See also