根据需求简单的实现一个小功能控件，暂时不支持扩展。
$（"xxxxxxx"）.iconCountPlugin（options, start, isOffset) { //三个参数，自定义样式，是否禁止图标位置随浏览器窗口变化而变化，是否禁用偏移量 这个是调用，后面俩参数可以根据需求自行进行调整，以兼容不同的浏览器，可能因为浏览器之间的差异导致出一些意想不到的错误. 复制代码 ; (function ($, window, document, undefined) { var inforCountShow = function (target, option, isOffset) { this.$element = target; var str = "<span class = 'infor-count'></span>"; var offsetleft = $(this.$element).offset().left; var offsetTop = $(this.$element).offset().top; var targetWidth = $(this.$element).width(); var targetHeight = $(this.$element).height(); var left = "", top = ""; if (!isOffset) { left = offsetleft + targetWidth - 18; top = offsetTop - 5; } else { left = targetWidth + 13; top = targetHeight - 3; } $(this.$element).after(str); this.defaults = { 'display': 'inline-block', 'width': '18px', 'height': '18px', 'position': 'absolute', 'backgroundColor': '#f43530', 'color': '#fff', 'borderRadius': '15px', 'textAlign': 'center', 'fontSize': '12px', "left": left, "top": top, "cursor": 'auto', 'margin':'auto' }; this.options = $.extend({}, this.defaults, option); this.createdDom = $(str); } inforCountShow.prototype = { //手动设置 changeStyle: function () { return $(this.$element).next().css({ 'display': this.options.display, 'width': this.options.width, 'height': this.options.height, 'position': this.options.position, 'backgroundColor': this.options.backgroundColor, 'color': this.options.color, 'borderRadius': this.options.borderRadius, 'zIndex': this.options.zIndex, 'textAlign': this.options.textAlign, 'fontSize': this.options.fontSize, "left": this.options.left, "top": this.options.top, 'lineHeight': this.options.lineHeight, "cursor": this.options.cursor, "margin": this.options.margin }); }, //浏览器窗口大小改变自适应，默认生效 onResize: function (target, isOffset) { $(window).resize(function () { var newOffsetleft = $(target).offset().left; var newOffsetTop = $(target).offset().top; var newTargetWidth = $(target).width(); var newTargetHeight = $(target).height(); var newleft = "", newTop = ""; if (!isOffset) { newleft = newOffsetleft + newTargetWidth - 18; newTop = newOffsetTop - 5; } else { newleft = newTargetWidth + 13; newTop = newTargetHeight - 3; } $(target).next().css({ "left": newleft, "top": newTop }); }); }, //数值溢出，当消息数量超过99时显示 "..." valueOverflow:function() { var value = $(this.$element).next().text(); if (null != value && value>99) { $(this.$element).next().text("..."); } }, //绑定事件，可以接受事件对应外部方法 bindEvent: function () { var that = this; if (!that.createdDom) return; this.createdDom.off('click').on('click', function () { if (that.options.click) { // that.options.click(); } else { } }); } } //调用 $.fn.iconCountPlugin = function (options, start, isOffset) { //三个参数，自定义样式，是否禁止图标位置随浏览器窗口变化而变化，是否禁用偏移量 return $(this).each(function () { var infor = new inforCountShow(this, options, isOffset); if (!start) { infor.onResize(this, isOffset); } infor.changeStyle(); infor.valueOverflow(); infor.bindEvent(); }); } })(jQuery, window, document);
此插件是笔者当时刚学习封装控件时的初次尝试，希望大佬们勿喷，有时间会把他进行优化，欢迎各位大神一起讨论.您的点赞是我最好的动力。