html - javascript code remove itself after being run - Stack Overflow

admin管理员组

文章数量:1324061

I am looking for a way to fill an array table by javascript code then remove that code not to allow users copy the table directly(or at least make it hard) from page as HTML.

<script>
   ....
</script>

how to remove the java script from the page after pleting its mission?

thanks

I am looking for a way to fill an array table by javascript code then remove that code not to allow users copy the table directly(or at least make it hard) from page as HTML.

<script>
   ....
</script>

how to remove the java script from the page after pleting its mission?

thanks

• javascript
• html

Share Improve this question Follow asked Jun 17, 2013 at 6:06 gerrnargerrnar 41711 gold badge77 silver badges1515 bronze badges 22

• I am not sure, you can remove code, while it is being executed. – LuigiEdlCarno Commented Jun 17, 2013 at 6:08
• Why you want to remove it? You can unbind the event/function when you don't need it.. – Paritosh Commented Jun 17, 2013 at 6:08
• 3 You could theoretically remove it from the DOM but it will still be in the page source. Javascript is executed on the client side so by definition the user already has a copy of it. – Mark Parnell Commented Jun 17, 2013 at 6:13
• 2 Even if you remove HTML from CTRL+U page, user will just press F12 and copy table from Firebug/Developer Tools. – dfsq Commented Jun 17, 2013 at 6:21
• 1 Then learn Ajax, removing JS-code much more difficult then AJAX... – Karl Adler Commented Jun 17, 2013 at 6:30

 |  Show 17 more ments

4 Answers 4

Sorted by: Reset to default 4

I don't really see a point in removing the JavaScript, but it would be possible. Give the script-element an ID to make it easier to select. Then place the code that will handle the removal in a separate script-element.

Given that the code you wan't to remove isn't asynchronous, something like this would do it:

<script id="foo">
    // Do your stuff here, create the table or whatever necessary
</script>

<script>
(function () {
    var node = document.getElementById("foo");
    if (node.parentNode) {
      node.parentNode.removeChild(node);
    }
})();
</script>

Demo

Update:

As Juhana points out in the ments, this will remove the script-element from the DOM, but the script element will still be visible if you look at the actual source of the page.

You can remove script element or do anything else but user can still get the table through debug mode. There are some ways to encrypt your source code，try: http://jsobfuscate./

document.currentScript.remove()

May be you can make it hard by disabling copy and paste function in your webpage:

<script type="text/JavaScript">
function killCopy(e){
return false
}
function reEnable(){
return true
}
document.onselectstart=new Function ("return false")
if (window.sidebar){
document.onmousedown=killCopy
document.onclick=reEnable
}
</script>

see http://www.boogiejack./no_copy_paste.html

But still users can get it, because they already have a copy of html on their local machine

本文标签： htmljavascript code remove itself after being runStack Overflow