Javascript implementation copy and paste operation instances

This article illustrates how javascript implements copy and paste operations. Share with you for your reference.

The specific implementation method is as follows:

<script language="javascript"> 

function readTxt() 

{ 

alert(window.clipboardData.getData("text")); 

} 

function setTxt() 

{ 

var t=document.getElementById("txt"); 

t.select(); 

window.clipboardData.setData('text',t.createTextRange().text); 

} 

</script> 

<input name="txt" value=" test "> 

<input type="button" value=" copy " onclick="setTxt()"> 

<input type="button" value=" read " onclick="readTxt()">