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/** * Character Counter v1.5.1 * ====================== * * Character Counter is a simple, Twitter style character counter. * * https://github.com/dtisgodsson/jquery-character-counter * * @author Darren Taylor * @author Email: shout@darrenonthe.net * @author Twitter: darrentaytay * @author Website: http://darrenonthe.net * */ (function($) { $.fn.characterCounter = function(opts){ var defaults = { exceeded: false, counterSelector: false, limit: 150, renderTotal: false, counterWrapper: 'span', counterCssClass: 'counter', counterFormat: '%1', counterExceededCssClass: 'exceeded', increaseCounting: false, onExceed: function(count) {}, onDeceed: function(count) {}, customFields: {} }; var options = $.extend(defaults, opts); return this.each(function() { var html5len = $(this).attr('maxlength'); if (typeof html5len !== typeof undefined && html5len !== false) { $.extend(defaults, { limit: parseInt($(this).attr('maxlength')) }); } if (!options.counterSelector) { $(this).after(generateCounter()); } bindEvents(this); checkCount(this); }); function customFields(params) { var i, html=''; for (i in params) { html += ' ' + i + '="' + params[i] + '"'; } return html; } function generateCounter() { var classString = options.counterCssClass; if ( options.customFields['class'] ) { classString += " " + options.customFields['class']; delete options.customFields['class']; } return '<'+ options.counterWrapper +customFields(options.customFields)+' class="' + classString + '"></'+ options.counterWrapper +'>'; } function renderText(count) { var rendered_count = options.counterFormat.replace(/%1/, count); if ( options.renderTotal ) { rendered_count += '/'+ options.limit; } return rendered_count; } function checkCount(element) { var characterCount = $(element).val().length; var counter = options.counterSelector ? $(options.counterSelector) : $(element).nextAll("." + options.counterCssClass).first(); var remaining = options.limit - characterCount; var condition = remaining < 0; if ( options.increaseCounting ) { remaining = characterCount; condition = remaining > options.limit; } if ( condition ) { counter.addClass(options.counterExceededCssClass); options.exceeded = true; options.onExceed(characterCount); } else { if ( options.exceeded ) { counter.removeClass(options.counterExceededCssClass); options.onDeceed(characterCount); options.exceeded = false; } } counter.html(renderText(remaining)); } function bindEvents(element) { $(element) .on("input change", function () { checkCount(element); }); } }; })(jQuery);
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