HTMLInputElement: maxLength property - Web APIs | MDN
Value
A number representing the element's maxlength if present, or -1.
Example
Given the following HTML:
html
<p>
<label for="password">Your password</label>
<input id="password" type="password" minlength="8" maxlength="20" />
</p>
You can use the maxLength property to retrieve or set the <input>'s maxlength attribute value:
js
const inputElement = document.querySelector("#password");
console.log(`Element's maxLength: ${inputElement.maxLength}`); // "Element's maxlength: 20"
inputElement.maxLength = 18; // updates the element's maxlength attribute value
Specifications
| Specification |
|---|
| HTML # dom-input-maxlength |