HTMLTextAreaElement: minLength property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2018.
The minLength property of the HTMLTextAreaElement interface indicates the minimum number of characters (in UTF-16 code units) required for the value of the <textarea> element to be valid. It reflects the element's minlength attribute. -1 means there is no minimum length requirement.
Note:
If the textarea has a value, and that value has fewer characters than the minlength attribute requires, the element is considered invalid and the ValidityState object's tooShort property will be true.
Value
A number representing the element's minlength if present or -1.
Example
Given the following HTML:
<p>
<label for="comment">Comment</label>
<textarea id="comment" minlength="10" maxlength="200"></textarea>
</p>
You can use the minLength property to retrieve or set the <textarea>'s minlength attribute value:
const textareaElement = document.querySelector("#comment");
console.log(`Element's minLength: ${textareaElement.minLength}`); // "Element's minlength: 10"
textareaElement.minLength = 5; // updates the element's minlength attribute value
Specifications
| Specification |
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| HTML # dom-textarea-minlength |
Browser compatibility
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minLength
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