JS_jQuery插件_autoGrowing

源自《jQuery 1.4 Plugin Development Beginner's Guide》。

 

// 插件代码/* jQuery.autoGrowing * require: jQuery 1.4+ */;(function($) {$.fn.extend({"autoGrowing": function(opt) {var defaults = {minHeight: 0,maxHeight: 80};var o = $.extend(defaults, opt);return this.each(function(){var ele = $(this);if (!ele.is("textarea")) return;var pValLength, pWidth, valLength, width, h;ele.css("overflow", "hidden").keyup(function(){valLength = $(this).val().length;width = $(this).attr("offsetWidth");if (valLength < pValLength || width != pWidth) {$(this).height(0);}h = Math.max(o.minHeight, Math.min($(this).attr("scrollHeight"), o.maxHeight));$(this).css("overflow", ($(this).attr("scrollHeight") > h ? "auto" : "hidden")).height(h);pValLength = valLength;pWidth = width;});})}})})(jQuery);