Detailed explanation of the method used in js oncontextmenu event-JS Tutorial-php.cn

Detailed explanation of the method used in js oncontextmenu event

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Release： 2018-05-19 11:36:02

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This article mainly introduces the detailed use of js oncontextmenu event. Friends who need it can refer to

Definition and use

oncontextmenu event when the user right-clicks on the element Triggers and opens context menu when mouse is pressed.
Note: All browsers support the oncontextmenu event, and the contextmenu element is only supported by the Firefox browser.

Example

Execute JavaScript when the user right-clicks the mouse on the

element:

<p oncontextmenu="myFunction()" contextmenu="mymenu">

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Use the oncontextmenu event to disable the right-click menu

onconTextmenu=window.event.returnValue=false; Disable the right-click menu. Use this to prohibit copying.

Add attribute code to :

<script>
 window.document.oncontextmenu = function(){ 
//alert(&#39;请不要点击鼠标右键！&#39;);
return false;
} 
</script>

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oncontextmenu="return false"

onselectstart=" return false" prohibits selection of content on the webpage

oncopy="return false" prevents copying of content selected by the user on the webpage

prevents users from saving webpages:

Use< The noscript> tag can prevent the webpage from being saved directly, but it cannot prevent the webpage from being downloaded using tools.

* is a wildcard character.

Example 1:

<html>
<head>
<title>OnContextMenu事件</title>
<script language="JavaScript">
<!--
function uFunction()
{   
　　document.all.infop.innerHTML=&#39;你按下了鼠标右键，但是右键菜单不能 显示！&#39;;
}
function uFunction2()
{  
　　document.all.infop.innerHTML=&#39;你按下了Ctrl+鼠标右键，可以 显示右键菜单。&#39;;
}
//-->
</script>
</head>
<body oncontextmenu="if(!event.ctrlKey){uFunction();return false}else{uFunction2()}">
　　<p id="infop">你按下了鼠标右键，但是右键菜单不能 显示！<br>你按下了Ctrl+鼠标右键，可以显示右键菜单。
　　</p>
</body>
</html>

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Example 2:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
  <title>利用OnMousedown和OnContextmenu为表格添加鼠标左中右键单击的处理</title>
  <script type="text/javascript">
　　　　var keyArray = new Array(
  　　　　new Array(0, "右键"),
  　　　　new Array(1, "左键"),
  　　　　new Array(2, "右键"), // 测试在IE7中按右键是2,在Maxthon2.0正式版中是0
  　　　　new Array(3, "左键右键同时按"),//在IE7中我测试捕获不到，慎用
  　　　　new Array(4, "中键")
  　　　　//测试同时按两个键更多的表示
  　　　　//new Array(6, "中键右键同时按")
　　　　);
　　　　function Click()
　　　　{
  　　　　var message = GetKeyMessage(event.button);
  　　　　alert(message);
  　　　　if (event.button == 2 || event.button == 0) //按右键，// 测试在IE7中按右键是2,在Maxthon2.0正式版中是0
  　　　　 {
    　　　　//处理代码
  　　　　}
　　　　}
　　　　function GetKeyMessage(button)
　　　　{
  　　　　for (var i = 0; i < keyArray.length; i++)
  　　　　{
    　　　　if (keyArray[i][0] == button)
    　　　　{
      　　　　return keyArray[i][1] + "， event.button = " + button;
    　　　　}
  　　　　}
  　　　　 return "未知组合键， event.button = " + button;
　　　　}
　　</script>
</head>
<body>
<table cellpadding="0" cellspacing="0" border="1">
<tr>
　　<!--oncontextmenu="return false"屏蔽快捷菜单-->
  <td oncontextmenu="return false" onmousedown="Click()">请分别用左键、右键、中键、左键右键组合点这里测试</td>
</tr>
<tr>
  <td>这个表格没有处理，点这里没反应</td>
</tr>
</table>
</body>
</html>

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The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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