You can use the maxlength
attribute (which is very well-supported across different browsers) on the HTML <input>
element to limit the maximum number of characters that a user can enter. For example:
<input type="text" maxlength="10" />
This would limit the user input in the <input>
element to a maximum of 10
characters (as UTF-16 code units).
Please note that if no maxlength
is set on the <input>
element, or a non-positive integer value is set, then no maximum character limit is imposed.
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