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README.md

validity-state

Monitor the validity state of form fields and provide informative messages on invalidation.

For any submittable element on a form, the following attributes can be added, the value of which being the message displayed on state invalidation:

  • badInput: the user has provided input that the browser is unable to convert.
  • patternMismatch: the value does not match the specified pattern.
  • rangeOverflow: the value is greater than the maximum specified by the max attribute.
  • rangeUnderflow: the value is less than the minimum specified by the min attribute.
  • stepMismatch: the value does not fit the rules determined by the step attribute (that is, it's not evenly divisible by the step value).
  • tooLong: the value exceeds the specified maxlength for HTMLInputElement or HTMLTextAreaElement objects.
  • typeMismatch: the value is not in the required syntax (when type is email or url).
  • valueMissing: the element has a required attribute, but no value.

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Monitor the validity state of form fields and provide informative messages on invalidation.

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