鼠标右键菜单
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网页上需要有个右键显示菜单的功能，无奈自带的UI上没有这个功能。
先准备自己写个的，但写得太丑了，写不下去^,^，只好作罢。
网上搜了个简单Demo，做了一些修改，去掉了一些没必要的东西（高深的看不懂）
想着留着以后肯定还会用得着的，既然有轮子，又何必再造轮子
效果图：
html代码部分：
<html lang="en"><head><meta http-equiv="content-type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE-8"><title>右键菜单Demo</title><link rel="stylesheet" type="text/css" href="css/context.standalone.css"><link rel="stylesheet" type="text/css" href="http://www.jq22.com/jquery/bootstrap-3.3.4.css"><script src="js/jquery-1.12.0.min.js"></script><script src="js/context.js"></script></head><body><div id="notDynamic" style="position: absolute; left: 0; height: 100%; width: 100%; background: yellow;">点右键的DIV</div><script>test_menu2 = [{header: '右鍵菜单'},{icon: 'glyphicon-plus',text: '添加',action: function(e, selector) {alert('Create clicked on ' + selector.prop("tagName") + ":" + selector.attr("id"));}},{icon: 'glyphicon-edit',text: '编辑',action: function(e, selector) {alert('Edit clicked on ' + selector.prop("tagName") + ":" + selector.attr("id"));}},{icon: 'glyphicon-list-alt',text: '更多',subMenu: [{text: '文本',action: function(e, selector) {alert('Text clicked on ' + selector.prop("tagName") + ":" + selector.attr("id"));}},{text: '文本',action: function(e, selector) {alert('Text clicked on ' + selector.prop("tagName") + ":" + selector.attr("id"));}}]}];context.init({preventDoubleContext: false});//在DIV上调用右键菜单context.attach('#notDynamic', test_menu2);</script></body></html>js代码部分：
context = (function() {var options = {fadeSpeed: 200,filter: function($obj) {// Modify $obj, Do not return},preventDoubleContext: true,compress: true//紧缩};function initialize(opts) {options = $.extend({}, options, opts);$(document).on('click', function() {$('.dropdown-context').fadeOut(options.fadeSpeed, function() {$('.dropdown-context').css({display: ''}).find('.drop-left').removeClass('drop-left');});});if(options.preventDoubleContext) {$(document).on('contextmenu', '.dropdown-context', function(e) {e.preventDefault();});}$(document).on('mouseenter', '.dropdown-submenu', function() {var $sub = $(this).find('.dropdown-context-sub:first'),subWidth = $sub.width(),subLeft = $sub.offset().left,collision = (subWidth + subLeft) > window.innerWidth;if(collision) {$sub.addClass('drop-left');}});}function updateOptions(opts) {options = $.extend({}, options, opts);}function buildMenu(data, id, subMenu) {var subClass = (subMenu) ? ' dropdown-context-sub' : '',compressed = options.compress ? ' compressed-context' : '',$menu = $('<ul class="dropdown-menu dropdown-context' + subClass + compressed + '" id="dropdown-' + id + '"></ul>');return buildMenuItems($menu, data, id, subMenu);}function buildMenuItems($menu, data, id, subMenu, addDynamicTag) {var linkTarget = '';for(var i = 0; i < data.length; i++) {if(typeof data[i].divider !== 'undefined') {var divider = '<li class="divider';divider += (addDynamicTag) ? ' dynamic-menu-item' : '';divider += '"></li>';$menu.append(divider);} else if(typeof data[i].header !== 'undefined') {var header = '<li class="nav-header';header += (addDynamicTag) ? ' dynamic-menu-item' : '';header += '">' + data[i].header + '</li>';$menu.append(header);} else if(typeof data[i].menu_item_src !== 'undefined') {var funcName;if(typeof data[i].menu_item_src === 'function') {if(data[i].menu_item_src.name === "") { // The function is declared like "foo = function() {}"for(var globalVar in window) {if(data[i].menu_item_src == window[globalVar]) {funcName = globalVar;break;}}} else {funcName = data[i].menu_item_src.name;}} else {funcName = data[i].menu_item_src;}$menu.append('<li class="dynamic-menu-src" data-src="' + funcName + '"></li>');} else {if(typeof data[i].href == 'undefined') {data[i].href = '#';}if(typeof data[i].target !== 'undefined') {linkTarget = ' target="' + data[i].target + '"';}if(typeof data[i].subMenu !== 'undefined') {var sub_menu = '<li class="dropdown-submenu';sub_menu += (addDynamicTag) ? ' dynamic-menu-item' : '';sub_menu += '"><a tabindex="-1" href="' + data[i].href + '">' + data[i].text + '</a></li>'$sub = (sub_menu);} else {var element = '<li';element += (addDynamicTag) ? ' class="dynamic-menu-item"' : '';element += '><a tabindex="-1" href="' + data[i].href + '"' + linkTarget + '>';if(typeof data[i].icon !== 'undefined')element += '<span class="glyphicon ' + data[i].icon + '"></span> ';element += data[i].text + '</a></li>';$sub = $(element);}if(typeof data[i].action !== 'undefined') {$action = data[i].action;$sub.find('a').addClass('context-event').on('click', createCallback($action));}$menu.append($sub);if(typeof data[i].subMenu != 'undefined') {var subMenuData = buildMenu(data[i].subMenu, id, true);$menu.find('li:last').append(subMenuData);}}if(typeof options.filter == 'function') {options.filter($menu.find('li:last'));}}return $menu;}function addContext(selector, data) {if(typeof data.id !== 'undefined' && typeof data.data !== 'undefined') {var id = data.id;$menu = $('body').find('#dropdown-' + id)[0];if(typeof $menu === 'undefined') {$menu = buildMenu(data.data, id);$('body').append($menu);}} else {var d = new Date(),id = d.getTime(),$menu = buildMenu(data, id);$('body').append($menu);}$(selector).on('contextmenu', function(e) {e.preventDefault();e.stopPropagation();currentContextSelector = $(this);$('.dropdown-context:not(.dropdown-context-sub)').hide();$dd = $('#dropdown-' + id);$dd.find('.dynamic-menu-item').remove(); // Destroy any old dynamic menu items$dd.find('.dynamic-menu-src').each(function(idx, element) {var menuItems = window[$(element).data('src')]($(selector));$parentMenu = $(element).closest('.dropdown-menu.dropdown-context');$parentMenu = buildMenuItems($parentMenu, menuItems, id, undefined, true);});$dd.addClass('dropdown-context-sub').css({top: e.pageY + 10,left: e.pageX - 13}).fadeIn(options.fadeSpeed);});}function destroyContext(selector) {$(document).off('contextmenu', selector).off('click', '.context-event');}return {init: initialize,settings: updateOptions,attach: addContext,destroy: destroyContext};})();var createCallback = function(func) {return function(event) {func(event, currentContextSelector)};}currentContextSelector = undefined;/** * ContextJS Styles * For use WITHOUT Twitters Bootstrap CSS */.nav-header { display: block; padding: 3px 15px; font-size: 11px; font-weight: bold; line-height: 20px; color: #999; text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5); text-transform: uppercase;}.dropdown-menu { position: absolute; top: 100%; left: 0; z-index: 1000; display: none; float: left; min-width: 160px; padding: 5px 0; margin: 2px 0 0; list-style: none; background-color: #ffffff; border: 1px solid #ccc; border: 1px solid rgba(0, 0, 0, 0.2); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 14px; *border-right-width: 2px; *border-bottom-width: 2px; -webkit-border-radius: 6px; -moz-border-radius: 6px; border-radius: 6px; -webkit-box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2); -moz-box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2); box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2); -webkit-background-clip: padding-box; -moz-background-clip: padding; background-clip: padding-box; text-align:left;}.dropdown-menu.pull-right { right: 0; left: auto;}.dropdown-menu .divider { *width: 100%; height: 1px; margin: 9px 1px; *margin: -5px 0 5px; overflow: hidden; background-color: #e5e5e5; border-bottom: 1px solid #e5e5e5;}.dropdown-menu a { display: block; padding: 3px 20px; clear: both; font-weight: normal; line-height: 20px; color: #333333; white-space: nowrap; text-decoration: none;}.dropdown-menu li > a:hover, .dropdown-menu li > a:focus, .dropdown-submenu:hover > a { color: #ffffff; text-decoration: none; background-color: #0088cc; background-color: #0081c2; background-image: -moz-linear-gradient(top, #0088cc, #0077b3); background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#0088cc), to(#0077b3)); background-image: -webkit-linear-gradient(top, #0088cc, #0077b3); background-image: -o-linear-gradient(top, #0088cc, #0077b3); background-image: linear-gradient(to bottom, #0088cc, #0077b3); background-repeat: repeat-x; filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff0088cc', endColorstr='#ff0077b3', GradientType=0);}.dropdown-menu .active > a, .dropdown-menu .active > a:hover { color: #ffffff; text-decoration: none; background-color: #0088cc; background-color: #0081c2; background-image: linear-gradient(to bottom, #0088cc, #0077b3); background-image: -moz-linear-gradient(top, #0088cc, #0077b3); background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#0088cc), to(#0077b3)); background-image: -webkit-linear-gradient(top, #0088cc, #0077b3); background-image: -o-linear-gradient(top, #0088cc, #0077b3); background-repeat: repeat-x; outline: 0; filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff0088cc', endColorstr='#ff0077b3', GradientType=0);}.dropdown-menu .disabled > a, .dropdown-menu .disabled > a:hover { color: #999999;}.dropdown-menu .disabled > a:hover { text-decoration: none; cursor: default; background-color: transparent;}.open { *z-index: 1000;}.open > .dropdown-menu { display: block;}.pull-right > .dropdown-menu { right: 0; left: auto;}.dropup .caret, .navbar-fixed-bottom .dropdown .caret { border-top: 0; border-bottom: 4px solid #000000; content: "\2191";}.dropup .dropdown-menu, .navbar-fixed-bottom .dropdown .dropdown-menu { top: auto; bottom: 100%; margin-bottom: 1px;}.dropdown-submenu { position: relative;}.dropdown-submenu > .dropdown-menu { top: 0; left: 100%; margin-top: -6px; margin-left: -1px; -webkit-border-radius: 0 6px 6px 6px; -moz-border-radius: 0 6px 6px 6px; border-radius: 0 6px 6px 6px;}.dropdown-submenu > .dropdown-menu.drop-left{ left:-100%;}.dropdown-submenu:hover .dropdown-menu { display: block;}.dropdown-submenu > a:after { display: block; float: right; width: 0; height: 0; margin-top: 5px; margin-right: -10px; border-color: transparent; border-left-color: #cccccc; border-style: solid; border-width: 5px 0 5px 5px; content: " ";}.dropdown-submenu:hover > a:after { border-left-color: #ffffff;}.dropdown .dropdown-menu .nav-header { padding-right: 20px; padding-left: 20px;}/** * Context Styles */.dropdown-context .nav-header { cursor: default;}.dropdown-context:before, .dropdown-context-up:before, .dropdown-context-left:before { position: absolute; top: -7px; left: 9px; display: inline-block; border-right: 7px solid transparent; border-bottom: 7px solid #ccc; border-left: 7px solid transparent; border-bottom-color: rgba(0, 0, 0, 0.2); content: '';}.dropdown-context:after, .dropdown-context-up:after, .dropdown-context-left:after { position: absolute; top: -6px; left: 10px; display: inline-block; border-right: 6px solid transparent; border-bottom: 6px solid #ffffff; border-left: 6px solid transparent; content: '';}.dropdown-context-up:before, .dropdown-context-up:after { top: auto; bottom: -7px; z-index: 9999;}.dropdown-context-up:before { border-right: 7px solid transparent; border-top: 7px solid #ccc; border-bottom: none; border-left: 7px solid transparent;}.dropdown-context-up:after { border-right: 6px solid transparent; border-top: 6px solid #ffffff; border-left: 6px solid transparent; border-bottom: none;}.dropdown-context-left:before { left: auto; right: 9px;}.dropdown-context-left:after { left: auto; right: 9px;}.dropdown-context-sub:before, .dropdown-context-sub:after { display: none;}.dropdown-context .dropdown-submenu:hover .dropdown-menu { display: none;}.dropdown-context .dropdown-submenu:hover > .dropdown-menu { display: block;}.compressed-context a{ padding-left: 14px; padding-top: 0; padding-bottom: 0; font-size: 13px; }.compressed-context .divider{ margin: 5px 1px; }.compressed-context .nav-header{ padding:1px 13px; }.dynamic-menu-src { display: none;}阅读全文
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