How to clear clipboarddata using javascript which support chrome browser?

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Clipboard in which current copied value is stored.
I can get the current value which is currently in clipboard using javascript and i am using chrome browser but i am unable to modify the clipboard value or clean clipboard data.because i ahve to design a system in which once i paste the copied value ,it should be deleted or remove from clipboard. when i try to paste again that value ,it should not be pasted.
Help

What I have tried:

document.addEventListener("paste", function (e) {
var clipText = e.clipboardData.getData('Text');

clipText= clipText.toUpperCase();

console.log(e.target.id);

if(temp2==clipText)
count=count+1;

e.preventDefault();

if(clipText!=null && count==0)
{

e.target.value = clipText ;
temp2=clipText;

}
else
if(temp2!=clipText ){

e.target.value = clipText ;
temp2=clipText;

}else{
if(temp2==clipText && count>0 )
{

e.target.value = "" ;

}
}
return false;
});

Posted 5-Feb-18 3:17am

poojakumawat1

Updated 5-Feb-18 3:37am

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Jochen Arndt · Answer 1 · 2018-02-05T03:37:00

Solution 1

There is no method to detect that another application has pasted data from the clipboard. Once data has been put on the clipboard, the data is owned by the system and can be queried by any other application.

All you can do is clearing the clipboard when your application is pasting. But you should not do so because the data may be from any application and the users might want to paste it multiple times.

You might want to provide the data by Drag & Drop instead because that is doing what you want: Once data are dropped or the drag operation is cancelled, the data are destroyed.

Posted 5-Feb-18 3:37am

Jochen Arndt

Comments

poojakumawat1 6-Feb-18 2:21am

there is only one page in which i have to clear clipboard when the same string gets pasted.
For e.g i have copied a string and i m trying to paste that string in one textbox and it should get pasted. then i try to paste that string in another textbox ,it should not be pasted.but if i again copy that string ,it should be pasted in textbox.
So all i want to clear my clipboard after pasting value
document.addEventListener("paste", function (e) {
e.target.value = e.clipboardData.getData('Text');

//Clear logic of clipboard in javascript
});
i could try this: e.clipboardData.setData('Text','');,clipboardData.cleardata();
but this is not supporting in chrome.
HELP

Jochen Arndt 6-Feb-18 2:52am

To clear the clipboard you have to set new data. This can be done with document.execCommand('copy') which requires an active selection (e.g. from a hidden textbox). Examples can be found by searching for "javascript copy to clipboard":
https://clipboardjs.com/
https://ourcodeworld.com/articles/read/143/how-to-copy-text-to-clipboard-with-javascript-easily