How to copy the text to the clipboard in JavaScript?

In order to copy the text to the clipboard in javascript we use document.execCommand() method . This can be done in two steps
Step1 : Write HTML code:

<!-- The text field -->
<input type="text" value="GeeksForGeeks" id="GfGInput"> 
  
<!-- The button used to copy the text -->
<button onclick="GeeksForGeeks()">Copy text</button>  

Step2 : Write JavaScript code:

function GeeksForGeeks() { 
  /* Get the text field */
  var copyGfGText = document.getElementById("GfGInput"); 
  
  /* Select the text field */
  copyGfGText.select(); 
  
  /* Copy the text inside the text field */
  document.execCommand("copy"); 
  
  /* Alert the copied text */
  alert("Copied the text: " + copyGfGText.value); 
}  

Note : The document.execCommand() method is not supported in IE8 and earlier.

Example 1:

<!DOCTYPE html> 
<html> 
    <body style = "text-align:center;"> 
        <h1 style = "color:green;" >   
            GeeksForGeeks   
        </h1> 
        <input type="text" value="GeeksForGeeks" id="GfGInput"> 
        <button onclick="GeeksForGeeks()">Copy text</button>  
        <script> 
            function GeeksForGeeks() { 
              var copyGfGText = document.getElementById("GfGInput"); 
              copyGfGText.select(); 
              document.execCommand("copy"); 
              alert("Copied the text: " + copyGfGText.value); 
            }  
        </script> 
        <p> 
            Click on the button to copy the text from the 
            text field. Try to paste the text (e.g. ctrl+v) 
            afterwards in a different window, to see the 
            effect. 
        </p> 
    </body> 
</html> 

Output :

After clicking on element:

Selected text is copied:

Example 2:

<!DOCTYPE html> 
<html> 
    <head> 
        <style>  
            h1 {  
            border: 1px solid black;  
            height: 90px;  
            padding-top: 40px;  
            background: green;  
            color: white;  
            }  
        </style> 
    </head> 
    <body style = "text-align:center;"> 
        <h1 style = "color:white;" >   
            GeeksForGeeks   
        </h1> 
        <input type="text" value="GeeksForGeeks" id="GfGInput"> 
        <button onclick="GeeksForGeeks()">Copy text</button>  
        <script> 
            function GeeksForGeeks() { 
              var copyGfGText = document.getElementById("GfGInput"); 
              copyGfGText.select(); 
              document.execCommand("copy"); 
              alert("Copied the text: " + copyGfGText.value); 
            }  
        </script> 
        <p>Click on the button to copy the text from the field. 
            Try to paste the text (e.g. "ctrl+v")to see the effect. 
        </p> 
    </body> 
</html> 

Output :

After clicking on element:

Selected text is copied:

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