dom events - How to disable combination of keys using javascript? - Stack Overflow

admin管理员组

文章数量:1389772

I would like to disable view source shortcut key for IE using JavaScript. To disable Ctrl + C, I am using the following function:

function disableCopy() {
     // current pressed key
     var pressedKey = String.fromCharCode(event.keyCode).toLowerCase();
     if (event.ctrlKey && (pressedKey == "c")) {
         // disable key press porcessing
         event.returnValue = false;
     }
}

Can any one suggest how to disable Alt + V + C bination?

I would like to disable view source shortcut key for IE using JavaScript. To disable Ctrl + C, I am using the following function:

function disableCopy() {
     // current pressed key
     var pressedKey = String.fromCharCode(event.keyCode).toLowerCase();
     if (event.ctrlKey && (pressedKey == "c")) {
         // disable key press porcessing
         event.returnValue = false;
     }
}

Can any one suggest how to disable Alt + V + C bination?

• javascript
• dom-events

Share Improve this question Follow edited Feb 2, 2023 at 20:19 Brian Tompsett - 汤莱恩 5,8937272 gold badges6161 silver badges133133 bronze badges asked Jul 11, 2012 at 13:22 Vinod VutpalaVinod Vutpala 85333 gold badges1111 silver badges1717 bronze badges 9

• 7 You realise this will not ultimately prevent people from viewing the source if they're determined, right? – Mitya Commented Jul 11, 2012 at 13:24
• 1 You want to disable viewing HTML source code? – Anuraj Commented Jul 11, 2012 at 13:24
• 1 Not sure why the downvote. The question may be flawed in concept, but for what it is, it's asked well enough and the OP shows a code attempt. +1. – Mitya Commented Jul 11, 2012 at 13:26
• 1 The web is open. If your page is good and people want to view your code then you should feel proud of yourself. If you're going to waste your energy preventing people from doing so then no one will bother reading through your code. It's not worth the hassle. – Aadit M Shah Commented Jul 11, 2012 at 13:27
• 6 This is an excellent way to make no one ever want to visit your webpage again. – jbabey Commented Jul 11, 2012 at 13:30

 |  Show 4 more ments

3 Answers 3

Sorted by: Reset to default 2

Every browser has its built-in functionality to view the source code or the webpage. We can do one thing. That is disabling right click in your page.

For disable right click use the following code:

<SCRIPT TYPE="text/javascript">
function disableselect(e){
return false
}
function reEnable(){
return true
}
//if IE4+
document.onselectstart=new Function ("return false")
//if NS6
if (window.sidebar){
document.onmousedown=disableselect
document.onclick=reEnable
}
</SCRIPT>

Remember one thing. We can view this source using firebug or some other third party tools. So we cant do this 100%.

You should not really prevent viewing code. Why?

Reasons

1. Eventually after all your efforts, if someone is determined he can still see your code.

2. You will defame your website by doing this.

3. You will kind-of behave like a "noob", as normally fellow developers see codes and they will break through your security measure by just disabling javascript.

4. There is no sensitive information in your code(I suppose) which can be used to pose a threat. But, if you have some code which can be used against the website you should really look into removing that code and making the website secure.

Disable binations

  document.onkeydown = function(e) {
        if (e.altKey && (e.keyCode === 67||e.keyCode === 86)) {//Alt+c, Alt+v will also be disabled sadly.
            alert('not allowed');
        }
        return false;
};​

Any ways, because I know how to do it, I will show you.

Here to disable right-click:

function clickIE() {if (document.all) {return false;}} 
function clickNS(e) {if 
(document.layers||(document.getElementById&&!document.all)) { 
if (e.which==2||e.which==3) {return false;}}} 
if (document.layers) 
{document.captureEvents(Event.MOUSEDOWN);document.onmousedown=clickNS;} 
else{document.onmouseup=clickNS;document.oncontextmenu=clickIE;} 
document.oncontextmenu=new Function("return false") 

alt + V + C is a very odd bination to have. Although following code will work, it's sort of hackish.

if (event.altKey) {
    if (event.keyCode == 67 && window.prevKey == 86)
        event.preventDefault();
    else if (event.keyCode == 86 && window.prevKey == 67)
        event.preventDefault();
    window.prevKey = event.keyCode
}

本文标签： dom eventsHow to disable combination of keys using javascriptStack Overflow