Today when developing a project, I need a function that simulates the mouse right-click menu. That is to say, when you right-click the mouse on the web page, it is not the system menu that pops up but the content we have formulated. This can expand the functions of the right click. Not much to say about the implementation process. The code and effects are as follows:
js part:
//Create right-click menu
var epMenu={
create:function(point,option){
var menuNode=document.getElementById('epMenu');
if(!menuNode){
//Create a menu node when there is no one
menuNode=document.createElement("div");
menuNode.setAttribute('class','epMenu');
menuNode.setAttribute('id','epMenu');
}else $(menuNode).html('');//Clear the content inside
$(menuNode).css({left:point.left 'px',top:point.top 'px'});
for(var x in option){
var tempNode=document.createElement("a");
$(tempNode).text(option[x]['name']).on('click',option[x].action);
menuNode.appendChild(tempNode);
}
$("body").append(menuNode);
},
Destory:function(){
$(".epMenu").remove();
}
};
The css part of the code is as follows:
/*Right-click menu*/
.epMenu{ width:120px; background:#f0f0f0; position:fixed; left:0; top:0; box-shadow:2px 2px 2px 2px #807878;}
.epMenu a{ display:block; height:25px; line-height:25px; padding-left:15px; border-top:1px solid #e0e0e0; border-bottom:1px solid #fff; font-family:Microsoft Yahei; font-size:14px; cursor:default;}
.epMenu a:hover{ background:#fff;}
Create the calling code as follows:
epMenu.create({left:500,top:500},[{name:'a1','action':addText},{name:'b222','action':addBtn},{name:'Add picture component ','action':addImage}]);
The destruction call code is as follows:
epMenu.destory();
The effect is as follows:
Calling instructions:
Create: epMenu.create(point,option);
point is an integer type, indicating the position of the menu, relative to the upper left corner of the browser.
Example: {left:100, top:500}
option json array type, represents the menu item, name represents the name, and action represents the action triggered by the click.
Example: [{name:'a1','action':addText},{name:'b222','action':addBtn},{name:'Add Image Component','action':addImage}]
Destruction: epMenu.destory();
Destruction requires no parameters.
This thing is actually very simple! It can also be expanded, such as adding pictures, secondary menus, etc. Since the development requirements of this project are relatively simple, that’s it.
The above is the entire content of this article, I hope you all like it.

实现方法:1、用“$("img").delay(毫秒数).fadeOut()”语句,delay()设置延迟秒数;2、用“setTimeout(function(){ $("img").hide(); },毫秒值);”语句,通过定时器来延迟。

区别:1、axios是一个异步请求框架,用于封装底层的XMLHttpRequest,而jquery是一个JavaScript库,只是顺便封装了dom操作;2、axios是基于承诺对象的,可以用承诺对象中的方法,而jquery不基于承诺对象。

修改方法:1、用css()设置新样式,语法“$(元素).css("min-height","新值")”;2、用attr(),通过设置style属性来添加新样式,语法“$(元素).attr("style","min-height:新值")”。

增加元素的方法:1、用append(),语法“$("body").append(新元素)”,可向body内部的末尾处增加元素;2、用prepend(),语法“$("body").prepend(新元素)”,可向body内部的开始处增加元素。

在jquery中,apply()方法用于改变this指向,使用另一个对象替换当前对象,是应用某一对象的一个方法,语法为“apply(thisobj,[argarray])”;参数argarray表示的是以数组的形式进行传递。

删除方法:1、用empty(),语法“$("div").empty();”,可删除所有子节点和内容;2、用children()和remove(),语法“$("div").children().remove();”,只删除子元素,不删除内容。

on()方法有4个参数:1、第一个参数不可省略,规定要从被选元素添加的一个或多个事件或命名空间;2、第二个参数可省略,规定元素的事件处理程序;3、第三个参数可省略,规定传递到函数的额外数据;4、第四个参数可省略,规定当事件发生时运行的函数。

去掉方法:1、用“$(selector).removeAttr("readonly")”语句删除readonly属性;2、用“$(selector).attr("readonly",false)”将readonly属性的值设置为false。


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