jQuery+css3弹出框插件

先来看DEMO：https://codepen.io/jonechen/pen/regjGG

插件的开发很简单，运用了CSS3的动画效果，并且弹出框的内容可以自定义。插件的默认配置参数有三个：

var defaults = {
	event: 'click',	// 默认点击事件
	dialogBox: 'selector', // 弹出框容器
	hover: false, // 默认滑动事件关闭
}

CSS部分：

*{padding: 0; margin: 0; list-style: none;font:14px/1.8 "microsoft yahei";}
body{background: #505050}
.btn{margin: 0 auto;width: 80px;  }
.btn a{display:block; text-decoration: none; background: red;color: #fff; text-align: center; height: 40px;line-height: 40px; }
.box{width: 500px;height: 100px;border:1px solid #ccc;padding: 10px; display: none;  }

HTML部分：

<div class="btn"><a href="#">点击我</a></div>
 
<div class="box">
	这是弹出内容
</div>

JS插件部分：

/***
	by jone 2016.5.17
***/
(function($) {
	$.fn.dropMenu = function(options) {
		var defaults = {
			event: 'click',	// 默认点击事件
			dialogBox: 'selector', // 弹出框容器
			hover: false, // 默认滑动事件关闭
		}
		var obj = $.extend(defaults, options);
		this.each(function() {
			var me = $(this);
			me.parent().css('position', 'relative');
			var wrapper = '<div class=\'wrapper\'><div class=\'space\'><i></i><em></em></div></div>';
			me.parent().append(wrapper);
			var _box = me.parent().find('.wrapper');
			obj.dialogBox.show().appendTo(_box);
			_box.css({
				position: 'absolute',
				top: me.outerHeight() + 11,
				boxShadow: '0 0 5px rgba(0,0,0,0.05)',
				transition: 'all 0.15s ease-in-out 0s',
				visibility: 'hidden',
				transformOrigin: 'left top',
				transform: 'scale(0)',
				background: '#fff',
			});
			_box.find('.space').css({
				width: '100%',
				height: '11px',
				position: 'absolute',
				top: '-11px',
				left: 0
			})
			var borderColor = obj.dialogBox.css('borderColor');
			_box.find("i,em").css({
				content: " ",
				borderColor: 'transparent transparent ' + borderColor + ' transparent',
				borderStyle: 'solid',
				borderWidth: '11px 8px',
				display: 'block',
				width: 0,
				height: 0,
				lineHeight: 0,
				fontSize: 0,
				position: 'absolute',
				left: me.parent().outerWidth() / 2 - 10,
				top: '-10px',
			})
			_box.find("em").css({
				borderColor: 'transparent transparent #fff transparent',
				top: '-8px',
			})
			var parentsWidth = me.parent().parent().innerWidth()
			var parentWidth = me.parent().outerWidth();
			var offsetWidth = me.parent().offset().left;
			if (offsetWidth >= parentsWidth - parentWidth) {
				_box.css({
					right: 0,
					transformOrigin: 'right top',
				});
				console.log(_box.outerWidth());
				_box.find("i,em").css({
					left: _box.outerWidth() - me.parent().outerWidth() - 10 + me.parent().outerWidth() / 2
				})
			}
			if (!obj.dialogBox || obj.dialogBox === undefined) {
				throw "error:obj.dialogBox is not defind";
				return
			}

			me.on(obj.event, function() {
				var display = _box.css('visibility');
				if (display == 'hidden') {
					_box.css({
						visibility: 'visible',
						transform: 'scale(1)'
					})
				} else {
					_box.css({
						visibility: 'hidden',
						transform: 'scale(0)'
					})
				}
			});
			if (obj.hover == true) {
				me.off(obj.event);
				me.on('mouseenter', show);
				me.on('mouseleave', hide);
				_box.on('mouseenter', show);
				_box.on('mouseleave', hide);
			}

			function show() {
				_box.css({
					visibility: 'visible',
					transform: 'scale(1)'
				})
			};

			function hide() {
				_box.css({
					visibility: 'hidden',
					transform: 'scale(0)'
				})
			};
		});
	}
})(jQuery)

插件调用方法：

// 插件调用
$(function() {
	$(".btn a").dropMenu({
		dialogBox: $(".box"),
	})
})

插件下载：jQuery.dropMenu.js