我想添加一个自定义右键菜单到我的web应用程序。这可以在不使用任何预先构建的库的情况下完成吗?如果是这样,如何显示一个简单的自定义右键菜单,不使用第三方JavaScript库?

我的目标是像谷歌Docs做的东西。它允许用户右键单击并显示用户自己的菜单。

注意: 我想学习如何制作我自己的,而不是使用别人已经制作的东西,因为大多数时候,那些第三方库的功能都很臃肿,而我只想要我需要的功能,所以我希望它完全由我手工制作。


当前回答

一些漂亮的CSS和一些没有外部库的非标准html标记的组合可以得到一个不错的结果(JSFiddle)

HTML

<menu id="ctxMenu">
    <menu title="File">
        <menu title="Save"></menu>
        <menu title="Save As"></menu>
        <menu title="Open"></menu>
    </menu>
    <menu title="Edit">
        <menu title="Cut"></menu>
        <menu title="Copy"></menu>
        <menu title="Paste"></menu>
    </menu>
</menu>

注意:菜单标签不存在,我是虚构的(你可以使用任何东西)

CSS

#ctxMenu{
    display:none;
    z-index:100;
}
menu {
    position:absolute;
    display:block;
    left:0px;
    top:0px;
    height:20px;
    width:20px;
    padding:0;
    margin:0;
    border:1px solid;
    background-color:white;
    font-weight:normal;
    white-space:nowrap;
}
menu:hover{
    background-color:#eef;
    font-weight:bold;
}
menu:hover > menu{
    display:block;
}
menu > menu{
    display:none;
    position:relative;
    top:-20px;
    left:100%;
    width:55px;
}
menu[title]:before{
    content:attr(title);
}
menu:not([title]):before{
    content:"\2630";
}

JavaScript只是为这个例子,我个人删除它在窗口上的持久菜单

var notepad = document.getElementById("notepad");
notepad.addEventListener("contextmenu",function(event){
    event.preventDefault();
    var ctxMenu = document.getElementById("ctxMenu");
    ctxMenu.style.display = "block";
    ctxMenu.style.left = (event.pageX - 10)+"px";
    ctxMenu.style.top = (event.pageY - 10)+"px";
},false);
notepad.addEventListener("click",function(event){
    var ctxMenu = document.getElementById("ctxMenu");
    ctxMenu.style.display = "";
    ctxMenu.style.left = "";
    ctxMenu.style.top = "";
},false);

还要注意,对于从右向左展开的菜单,您可能会将菜单> menu{left:100%;}修改为菜单> menu{right:100%;}。你需要在某个地方加上一个边距之类的东西

其他回答

对于那些使用bootstrap 5和jQuery 3寻找一个非常简单的自定义上下文菜单的自包含实现的人来说,这里是…

<!doctype html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-gH2yIJqKdNHPEq0n4Mqa/HGKIhSkIHeL5AyhkYV8i59U5AR6csBvApHHNl/vI1Bx" crossorigin="anonymous">
    <title>Custom Context Menu</title>
</head>
<style>
#context-menu {
  position: absolute;
  display: none;
}
</style>
<body>
    <div class="container-fluid p-5">
        <div class="row p-5">
            <div class="col-4">
                <span id="some-element" class="border border-2 border-primary p-5">Some element</span>
            </div>
        </div>
        <div id="context-menu" class="dropdown clearfix">
            <ul class="dropdown-menu" style="display:block;position:static;margin-bottom:5px;">
              <li><a class="dropdown-item" href="#" data-value="copy">Copy</a></li>
              <li><hr class="dropdown-divider"></li>
              <li><a class="dropdown-item" href="#" data-value="select-all">Select All</a></li>
            </ul>
        </div>       
        <script src="https://code.jquery.com/jquery-3.6.1.min.js" integrity="sha256-o88AwQnZB+VDvE9tvIXrMQaPlFFSUTR+nldQm1LuPXQ=" crossorigin="anonymous"></script>
        <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-A3rJD856KowSb7dwlZdYEkO39Gagi7vIsF0jrRAoQmDKKtQBHUuLZ9AsSv4jD4Xa" crossorigin="anonymous"></script>
        <script>
            $('body').on('contextmenu', '#some-element', function(e) {
                $('#context-menu').css({
                    display: "block",
                    left: e.pageX,
                    top: e.pageY
                });
                return false;
            });
            $('html').click(function() {
                $('#context-menu').hide();
            });
            $("#context-menu li a").click(function(e){
                console.log('in context-menu item, value = ' + $(this).data('value'));
            });
        </script>
    </body>
</html>

改编自https://codepen.io/anirugu/pen/xjjxvG

对我很有用。为了让像我这样的人,期待绘制菜单,我把我用来制作右键菜单的代码放在这里:

$(document).ready(function() { if ($("#test").addEventListener) { $("#test").addEventListener('contextmenu', function(e) { alert("You've tried to open context menu"); //here you draw your own menu e.preventDefault(); }, false); } else { //document.getElementById("test").attachEvent('oncontextmenu', function() { //$(".test").bind('contextmenu', function() { $('body').on('contextmenu', 'a.test', function() { //alert("contextmenu"+event); document.getElementById("rmenu").className = "show"; document.getElementById("rmenu").style.top = mouseY(event) + 'px'; document.getElementById("rmenu").style.left = mouseX(event) + 'px'; window.event.returnValue = false; }); } }); // this is from another SO post... $(document).bind("click", function(event) { document.getElementById("rmenu").className = "hide"; }); function mouseX(evt) { if (evt.pageX) { return evt.pageX; } else if (evt.clientX) { return evt.clientX + (document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft); } else { return null; } } function mouseY(evt) { if (evt.pageY) { return evt.pageY; } else if (evt.clientY) { return evt.clientY + (document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop); } else { return null; } } .show { z-index: 1000; position: absolute; background-color: #C0C0C0; border: 1px solid blue; padding: 2px; display: block; margin: 0; list-style-type: none; list-style: none; } .hide { display: none; } .show li { list-style: none; } .show a { border: 0 !important; text-decoration: none; } .show a:hover { text-decoration: underline !important; } <!-- jQuery should be at least version 1.7 --> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script> <script src="contextmenu.js"></script> <link rel="stylesheet" href="contextmenu.css" /> <div id="test1"> <a href="www.google.com" class="test">Google</a> <a href="www.google.com" class="test">Link 2</a> <a href="www.google.com" class="test">Link 3</a> <a href="www.google.com" class="test">Link 4</a> </div> <!-- initially hidden right-click menu --> <div class="hide" id="rmenu"> <ul> <li> <a href="http://www.google.com">Google</a> </li> <li> <a href="http://localhost:8080/login">Localhost</a> </li> <li> <a href="C:\">C</a> </li> </ul> </div>

我知道这个问题已经有了答案,但我花了一些时间来解决第二个答案,以使本机上下文菜单消失,并在用户单击的地方显示出来。 超文本标记语言

<body>
    <div id="test1">
        <a href="www.google.com" class="test">Google</a>
        <a href="www.google.com" class="test">Link 2</a>
        <a href="www.google.com" class="test">Link 3</a>
        <a href="www.google.com" class="test">Link 4</a>
    </div>

    <!-- initially hidden right-click menu -->
    <div class="hide" id="rmenu">
        <ul>
            <li class="White">White</li>
            <li>Green</li>
            <li>Yellow</li>
            <li>Orange</li>
            <li>Red</li>
            <li>Blue</li>
        </ul>
    </div>
</body>

CSS

.hide {
  display: none;
}

#rmenu {
  border: 1px solid black;
  background-color: white;
}

#rmenu ul {
  padding: 0;
  list-style: none;
}
#rmenu li
{
  list-style: none;
  padding-left: 5px;
  padding-right: 5px;
}

JavaScript

if (document.getElementById('test1').addEventListener) {
    document.getElementById('test1').addEventListener('contextmenu', function(e) {
            $("#rmenu").toggleClass("hide");
            $("#rmenu").css(
              {
                position: "absolute",
                top: e.pageY,
                left: e.pageX
              }
            );
            e.preventDefault();
     }, false);
}

// this is from another SO post...  
$(document).bind("click", function(event) {
  document.getElementById("rmenu").className = "hide";
});

CodePen例子

已测试,可在Opera 12.17, firefox 30, Internet Explorer 9和chrome 26.0.1410.64中运行

document.oncontextmenu =function( evt ){
        alert("OK?");
        return false;
        }

根据这里和其他'流程的答案,我已经制作了一个看起来像谷歌Chrome的版本,带有css3过渡。 JS小提琴

让我们开始简单,因为我们有上面的js在这个页面上,我们可以担心css和布局。我们将使用的布局是一个<a>元素和一个<img>元素或一个字体awesome图标(<i class="fa fa-flag"></i>)和一个<span>来显示键盘快捷键。这就是结构:

<a href="#" onclick="doSomething()">
  <img src="path/to/image.gif" />
  This is a menu option
  <span>Ctrl + K</span>
</a>

我们将把这些放在一个div中,并在右键菜单中显示该div。让我们风格他们像在谷歌Chrome浏览器,好吗?

#menu a {
  display: block;
  color: #555;
  text-decoration: no[...]

现在,我们将从接受的答案中添加代码,并获得游标的X和Y值。为此,我们将使用e.clientX和e. clienti。我们正在使用客户端,所以菜单div必须被修复。

var i = document.getElementById("menu").style;
if (document.addEventListener) {
  document.addEventListener('contextmenu', function(e) {
    var posX = e.clientX;
    var posY = e.client[...]

And that is it! Just add the css transisions to fade in and out, and done! var i = document.getElementById("menu").style; if (document.addEventListener) { document.addEventListener('contextmenu', function(e) { var posX = e.clientX; var posY = e.clientY; menu(posX, posY); e.preventDefault(); }, false); document.addEventListener('click', function(e) { i.opacity = "0"; setTimeout(function() { i.visibility = "hidden"; }, 501); }, false); } else { document.attachEvent('oncontextmenu', function(e) { var posX = e.clientX; var posY = e.clientY; menu(posX, posY); e.preventDefault(); }); document.attachEvent('onclick', function(e) { i.opacity = "0"; setTimeout(function() { i.visibility = "hidden"; }, 501); }); } function menu(x, y) { i.top = y + "px"; i.left = x + "px"; i.visibility = "visible"; i.opacity = "1"; } body { background: white; font-family: sans-serif; color: #5e5e5e; } #menu { visibility: hidden; opacity: 0; position: fixed; background: #fff; color: #555; font-family: sans-serif; font-size: 11px; -webkit-transition: opacity .5s ease-in-out; -moz-transition: opacity .5s ease-in-out; -ms-transition: opacity .5s ease-in-out; -o-transition: opacity .5s ease-in-out; transition: opacity .5s ease-in-out; -webkit-box-shadow: 2px 2px 2px 0px rgba(143, 144, 145, 1); -moz-box-shadow: 2px 2px 2px 0px rgba(143, 144, 145, 1); box-shadow: 2px 2px 2px 0px rgba(143, 144, 145, 1); padding: 0px; border: 1px solid #C6C6C6; } #menu a { display: block; color: #555; text-decoration: none; padding: 6px 8px 6px 30px; width: 250px; position: relative; } #menu a img, #menu a i.fa { height: 20px; font-size: 17px; width: 20px; position: absolute; left: 5px; top: 2px; } #menu a span { color: #BCB1B3; float: right; } #menu a:hover { color: #fff; background: #3879D9; } #menu hr { border: 1px solid #EBEBEB; border-bottom: 0; } <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css" rel="stylesheet"/> <h2>CSS3 and JAVASCRIPT custom menu.</h2> <em>Stephan Stanisic | Lisence free</em> <p>Right-click anywhere on this page to open the custom menu. Styled like the Google Chrome contextmenu. And yes, you can use <i class="fa fa-flag"></i>font-awesome</p> <p style="font-size: small"> <b>Lisence</b> <br /> "THE PIZZA-WARE LICENSE" (Revision 42): <br /> You can do whatever you want with this stuff. If we meet some day, and you think this stuff is worth it, you can buy me a Pizza in return. <br /> <a style="font-size:xx-small" href="https://github.com/KLVN/UrbanDictionary_API#license">https://github.com/KLVN/UrbanDictionary_API#license</a> </p> <br /> <br /> <small>(The white body background is just because I hate the light blue editor background on the result on jsfiddle)</small> <div id="menu"> <a href="#"> <img src="http://puu.sh/nr60s/42df867bf3.png" /> AdBlock Plus <span>Ctrl + ?!</span> </a> <a href="#"> <img src="http://puu.sh/nr5Z6/4360098fc1.png" /> SNTX <span>Ctrl + ?!</span> </a> <hr /> <a href="#"> <i class="fa fa-fort-awesome"></i> Fort Awesome <span>Ctrl + ?!</span> </a> <a href="#"> <i class="fa fa-flag"></i> Font Awesome <span>Ctrl + ?!</span> </a> </div>