怎么用js做出自定义菜单对li标签右键删除/变颜色效果

发布网友发布时间：2022-04-07 05:57

共2个回答

懂视网时间：2022-04-07 10:18

1、使用方式

js文件引入<script src="RightMenu.js"></script>

初始化：

let rightMenu = new RightMenu({
 targetId:'menu',//需要改变右键菜单的元素id
 menuItems: items//菜单项数据，json数组
 })

2、menuItems参数

items = [
 {
 id: 'aa',//菜单id
 text: 'ccc',//菜单文字，可以是html元素
 show: true, //菜单是否显示
 active: false,//菜单是否可用
 style: 'item-unactive'
 }
]

3、方法

setItems(menuItems) 设置菜单。动态设置菜单

hide() 隐藏菜单

on(eventType, event) 事件监听

4、事件

itemClick 菜单项点击，回调函数参数为菜单项的所有属性

例：

rightMenu.on('itemClick',(param) => {
 console.log(param)
 if(param.active === false){
 return
 }
 alert(JSON.stringify(param))
 // rightMenu.hide()
})

createBefore 菜单内容生成前调用，可以实现动态菜单设置

例：

rightMenu.on('createBefore',(param) => {
 rightMenu.setItems(items1)
})

注：暂不支持级联功能

代码：

class RightMenu{
 constructor(param){
 this.targetId = param.targetId
 this.ele = document.querySelector('#' + this.targetId)
 console.assert(this.ele != null, '未找到id=' + this.targetId + '的元素')
 this.menu = null
 this.menuItems = param.menuItems
 this._menuItems = {}
 this.itemDefaultClass = 'item-default'
 this.event = {
 itemClick: null,
 createBefore: null
 }
 this.flag = true
 this.init()
 }
 
 init(){
 let that = this
 that.createMenu()
 this.ele.oncontextmenu = function(ee) {
 let e = ee || window.event;
 //鼠标点的坐标
 let oX = e.clientX;
 let oY = e.clientY;
 //菜单出现后的位置
 that.menu.style.display = "block";
 that.menu.style.left = oX + "px";
 that.menu.style.top = oY + "px";
 that.createMenu()
 //阻止浏览器默认事件
 return false;//一般点击右键会出现浏览器默认的右键菜单，写了这句代码就可以阻止该默认事件。
 }
 document.oncontextmenu = function(ee){
 let e = ee || window.event;
 if(e.target.id !== that.targetId && e.target.dataset.type != 'item'){
 that.menu.style.display = "none"
 }
 }
 document.onclick = function(ee) {
 let e = ee || window.event;
 that.menu.style.display = "none"
 }
 that.menu.onclick = function(ee) {
 let e = ee || window.event;
 if(e.target.dataset.type == 'item'){
 if(that.event.itemClick instanceof Function){
 that.event.itemClick(that._menuItems[e.target.id])
 }
 }
 e.cancelBubble = true;
 }
 this.menu.onmouseover = function(ee){
 that.flag = true
 }
 this.menu.onmouseleave = function(ee){
 that.flag = false
 }
 }
 createMenu(){
 if(this.menu == null){
 this.menu = document.createElement('div')
 this.menu.className = 'menu-default'
 document.body.appendChild(this.menu)
 }
 
 let mark = true
 if(this.event.createBefore instanceof Function){
 mark = this.event.createBefore()
 }
 if(mark){
 this.creatItem()
 }
 }
 _bindOncontextmenu(obj){
 obj.oncontextmenu = function(ee){
 ee.target.click()
 return false
 }
 }
 creatItem(){
 if(this.menuItems.length == 0){
 return
 }
 let fragement = document.createDocumentFragment()
 let temp = null
 let tempItem = null
 for (let i = 0, len = this.menuItems.length; i < len; i++){
 tempItem = this.menuItems[i]
 if(tempItem.show === false){
 continue
 }
 temp = document.createElement('div')
 temp.id = tempItem.id
 temp.innerHTML = tempItem.text
 temp.className = tempItem.style || 'item-default'
 temp.dataset.type = 'item'
 
 this._menuItems[tempItem.id] = tempItem
 fragement.appendChild(temp)
 this._bindOncontextmenu(temp)
 }
 this.menu.innerHTML = ''
 this.menu.appendChild(fragement)
 }
 
 on(type,event){
 this.event[type] = event
 }
 
 hide(){
 this.menu.style.display = 'none'
 }
 
 setItems(items){
 this.menuItems = items
 this.creatItem()
 }
}

推荐教程：js教程

热心网友时间：2022-04-07 07:26

js里面没有直接的右击事件，可采用onmousedown事件进行判断实现。如下：

2、数据的过滤方法有很多，javaScript 、jQuery里面的filter函数，鉴于本题，最好采用angularJs实现。总体参考代码如下：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js">

    </script>
    <script type="text/javascript">
        window.onload = function(){
            //去掉默认的contextmenu事件，否则会和右键事件同时出现。
            document.oncontextmenu = function(e){
                e.preventDefault();
            };
            document.getElementById("test").onmousedown = function(e){
                if(e.button ==2){
                    alert("你点了右键");
                    //这样设计你的颜色样式...
                }else if(e.button ==0){
                    alert("你点了左键");
                }else if(e.button ==1){
                    alert("你点了滚轮");
                }
            }
        }
    </script>
</head>
<body>
<div ng-app="myApp" ng-controller="namesCtrl">
    <p>输入过滤:</p>
    <p><input type="text" ng-model="test"></p>
    <ul>
        <li ng-repeat="x in names | filter:test | orderBy:'pin'">
            {{ (x.name | uppercase) + ', ' + x.pin }}
        </li>
    </ul>
</div>
<script>
    angular.mole('myApp', []).controller('namesCtrl', function($scope) {
        $scope.names = [
            {name:'张三',pin:'zhang san'},
            {name:'王斌',pin:'wang bin'},
            {name:'*',pin:'zhang chun qiao'},
            {name:'王滨',pin:'wang bin'}
        ];
    });
</script>
<div style="width: 600px;height:50px;margin:auto;border:1px solid pink" id="test">
    <p>朝鲜新建农场</p>
</div>
</body>
</html>

怎么用js做出自定义菜单对li标签 右键 删除/变颜色 效果

怎么用js做出自定义菜单对li标签右键删除/变颜色效果