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
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
其他回答
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>
你可以用这段代码来做。 访问这里获得完整的自动边缘检测教程http://www.voidtricks.com/custom-right-click-context-menu/
$(document).ready(function () {
$("html").on("contextmenu",function(e){
//prevent default context menu for right click
e.preventDefault();
var menu = $(".menu");
//hide menu if already shown
menu.hide();
//get x and y values of the click event
var pageX = e.pageX;
var pageY = e.pageY;
//position menu div near mouse cliked area
menu.css({top: pageY , left: pageX});
var mwidth = menu.width();
var mheight = menu.height();
var screenWidth = $(window).width();
var screenHeight = $(window).height();
//if window is scrolled
var scrTop = $(window).scrollTop();
//if the menu is close to right edge of the window
if(pageX+mwidth > screenWidth){
menu.css({left:pageX-mwidth});
}
//if the menu is close to bottom edge of the window
if(pageY+mheight > screenHeight+scrTop){
menu.css({top:pageY-mheight});
}
//finally show the menu
menu.show();
});
$("html").on("click", function(){
$(".menu").hide();
});
});
`
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>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<head>
<title>Context menu - LabLogic.net</title>
</head>
<body>
<script language="javascript" type="text/javascript">
document.oncontextmenu=RightMouseDown;
document.onmousedown = mouseDown;
function mouseDown(e) {
if (e.which===3) {//righClick
alert("Right-click menu goes here");
}
}
function RightMouseDown() { return false; }
</script>
</body>
</html>
经过测试，可在Opera 11.6, firefox 9.01, Internet Explorer 9和chrome 17中运行 你可以在javascript右键菜单中查看工作示例
试试这个:
var cls = true; var ops; window.onload = function() { document.querySelector(".container").addEventListener("mouseenter", function() { cls = false; }); document.querySelector(".container").addEventListener("mouseleave", function() { cls = true; }); ops = document.querySelectorAll(".container td"); for (let i = 0; i < ops.length; i++) { ops[i].addEventListener("click", function() { document.querySelector(".position").style.display = "none"; }); } ops[0].addEventListener("click", function() { setTimeout(function() { /* YOUR FUNCTION */ alert("Alert 1!"); }, 50); }); ops[1].addEventListener("click", function() { setTimeout(function() { /* YOUR FUNCTION */ alert("Alert 2!"); }, 50); }); ops[2].addEventListener("click", function() { setTimeout(function() { /* YOUR FUNCTION */ alert("Alert 3!"); }, 50); }); ops[3].addEventListener("click", function() { setTimeout(function() { /* YOUR FUNCTION */ alert("Alert 4!"); }, 50); }); ops[4].addEventListener("click", function() { setTimeout(function() { /* YOUR FUNCTION */ alert("Alert 5!"); }, 50); }); } document.addEventListener("contextmenu", function() { var e = window.event; e.preventDefault(); document.querySelector(".container").style.padding = "0px"; var x = e.clientX; var y = e.clientY; var docX = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth || document.body.offsetWidth; var docY = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight || document.body.offsetHeight; var border = parseInt(getComputedStyle(document.querySelector(".container"), null).getPropertyValue('border-width')); var objX = parseInt(getComputedStyle(document.querySelector(".container"), null).getPropertyValue('width')) + 2; var objY = parseInt(getComputedStyle(document.querySelector(".container"), null).getPropertyValue('height')) + 2; if (x + objX > docX) { let diff = (x + objX) - docX; x -= diff + border; } if (y + objY > docY) { let diff = (y + objY) - docY; y -= diff + border; } document.querySelector(".position").style.display = "block"; document.querySelector(".position").style.top = y + "px"; document.querySelector(".position").style.left = x + "px"; }); window.addEventListener("resize", function() { document.querySelector(".position").style.display = "none"; }); document.addEventListener("click", function() { if (cls) { document.querySelector(".position").style.display = "none"; } }); document.addEventListener("wheel", function() { if (cls) { document.querySelector(".position").style.display = "none"; static = false; } }); .position { position: absolute; width: 1px; height: 1px; z-index: 2; display: none; } .container { width: 220px; height: auto; border: 1px solid black; background: rgb(245, 243, 243); } .container p { height: 30px; font-size: 18px; font-family: arial; width: 99%; cursor: pointer; display: flex; justify-content: center; align-items: center; background: rgb(245, 243, 243); color: black; transition: 0.2s; } .container p:hover { background: lightblue; } td { font-family: arial; font-size: 20px; } td:hover { background: lightblue; transition: 0.2s; cursor: pointer; } <div class="position"> <div class="container" align="center"> <table style="text-align: left; width: 99%; margin-left: auto; margin-right: auto;" border="0" cellpadding="2" cellspacing="2"> <tbody> <tr> <td style="vertical-align: middle; text-align: center;">Option 1<br> </td> </tr> <tr> <td style="vertical-align: middle; text-align: center;">Option 2<br> </td> </tr> <tr> <td style="vertical-align: middle; text-align: center;">Option 3<br> </td> </tr> <tr> <td style="vertical-align: middle; text-align: center;">Option 4<br> </td> </tr> <tr> <td style="vertical-align: middle; text-align: center;">Option 5<br> </td> </tr> </tbody> </table> </div> </div>
