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HTMLTextAreaElement: setCustomValidity() - Web API | MDN

OS

HTMLTextAreaElement: setCustomValidity()

Baseline

20157

setCustomValidity() HTMLTextAreaElement <textarea>

js

setCustomValidity(string)

string

<textarea>

js

const comment = document.getElementById("comment");
if (comment.validity.valueMissing) {
  comment.setCustomValidity("");
} else if (comment.validity.tooShort) {
  comment.setCustomValidity("");
} else if (comment.validity.tooLong) {
  comment.setCustomValidity(
    " 800 ",
  );
} else {
  comment.setCustomValidity("");
}


HTML # dom-cva-setcustomvalidity-dev

MDN

MDN 2025412

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