How to prevent user to enter text in textarea after reaching max character limit

Question

I want to prevent user to enter text in textarea once it reaches a max character limit. What was happening that when i reached to max limit then my text-area scroll-bar move

Answer 1

The keyup event fires after the default behaviour (populating text area) has occurred.

It's better to use the keypress event, and filter non-printable characters.

Demo: http://jsfiddle.net/3uhNP/1/ (with max length 4)

jQuery(document).ready(function($) {
    var max = 400;
    $('textarea.max').keypress(function(e) {
        if (e.which < 0x20) {
            // e.which < 0x20, then it's not a printable character
            // e.which === 0 - Not a character
            return;     // Do nothing
        }
        if (this.value.length == max) {
            e.preventDefault();
        } else if (this.value.length > max) {
            // Maximum exceeded
            this.value = this.value.substring(0, max);
        }
    });
}); //end if ready(fn)