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How do you impose a character limit on a text input in HTML?
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The HTML <input> tag is used to get user input in HTML. To give a limit to the input field, use the min and max attributes, which is to specify a maximum and minimum value for an input field respectively. To limit the number of characters, use the maxlength attribute.
The maxlength attribute defines the maximum number of characters (as UTF-16 code units) the user can enter into an <input> or <textarea> . This must be an integer value 0 or higher. If no maxlength is specified, or an invalid value is specified, the input or textarea has no maximum length.
You can specify a minimum length (in characters) for the entered value using the minlength attribute; similarly, use maxlength to set the maximum length of the entered value, in characters. The example below requires that the entered value be 4–8 characters in length.
It uses a full byte (8-bits) to represent 256 different characters. Since Windows-1252 has been the default in Windows, it is supported by all browsers.
There are 2 main solutions:
The pure HTML one:
<input type="text" id="Textbox" name="Textbox" maxlength="10" /> The JavaScript one (attach it to a onKey Event):
function limitText(limitField, limitNum) { if (limitField.value.length > limitNum) { limitField.value = limitField.value.substring(0, limitNum); } } But anyway, there is no good solution. You can not adapt to every client's bad HTML implementation, it's an impossible fight to win. That's why it's far better to check it on the server side, with a PHP / Python / whatever script.
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