74249687
 Luigi Serra
Cross browser con...
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(function ($) {
$.fn.characterCounter = function(){
return this.each(function(){
var itHasLengthAttribute = $(this).attr('length') !== undefined;
if(itHasLengthAttribute){
$(this).on('input', updateCounter);
$(this).on('focus', updateCounter);
$(this).on('blur', removeCounterElement);
addCounterElement($(this));
}
});
};
function updateCounter(){
var maxLength = +$(this).attr('length'),
actualLength = +$(this).val().length,
isValidLength = actualLength <= maxLength;
$(this).parent().find('span[class="character-counter"]')
.html( actualLength + '/' + maxLength);
addInputStyle(isValidLength, $(this));
}
function addCounterElement($input){
var $counterElement = $('<span/>')
.addClass('character-counter')
.css('float','right')
.css('font-size','12px')
.css('height', 1);
$input.parent().append($counterElement);
}
function removeCounterElement(){
$(this).parent().find('span[class="character-counter"]').html('');
}
function addInputStyle(isValidLength, $input){
var inputHasInvalidClass = $input.hasClass('invalid');
if (isValidLength && inputHasInvalidClass) {
$input.removeClass('invalid');
}
else if(!isValidLength && !inputHasInvalidClass){
$input.removeClass('valid');
$input.addClass('invalid');
}
}
$(document).ready(function(){
$('input, textarea').characterCounter();
});
}( jQuery ));
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