Javascript Copy Text To Clipboard Without Click Any Button On Page Load

Question

I've been trying to copy the Content of a my P tag to my clipboard without any button click. I tried it work on perfectly button click.Here is my working code for onClick.

Solution 1:

Many document.execCommand methods (like copy) require a user interaction (like a click) because it is considered a security risk to get access to the clipboard (which is system level, not browser level) with automagic methods like what is being asked for. You might need to re-think what you are trying to achieve by copying on page load.

What is the use-case for the above, and perhaps someone can help with your scenario?

[edit] Here's a link that shows your script on codepen. When you "run" the page it should give the "didn't work" output, when you click the button it should give the "worked" output

<!DOCTYPE html><htmllang="en"><head><scriptsrc="https://code.jquery.com/jquery-3.3.1.min.js"integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8="crossorigin="anonymous"></script><script>functioncopyToClipboard(element) {
  var $temp = $("<input>");
  $("body").append($temp);
  $temp.val($(element).text()).select();
  var status = document.execCommand("copy");
  if(status){
   $("#output").text("worked")
  }else{
   $("#output").text("didn't work")
  }
  $temp.remove();
 }
</script></head><bodyonload="copyToClipboard('#p1')"><pid="p1">Text to copy on page load, but won't work</p><buttononclick="copyToClipboard('#p1')">Copy the text</button><pid="output"></p></body></html>

If this is for a local project (i.e. won't be in the public domain) there are perhaps flags you can set in chrome to override the security risk, but I don't know what they are or if they exist, but might be worth a look.

[updated edit] I am very confused by something. This feels like a total hack, but it is working for me (on glitch.com), so I might stand corrected. I used the native navigator.clipboard.writeText method, and it didn't work either BUT when I was trying both methods side-by-side (in chrome) to test that both wouldn't work, it did work for the "navigator" one. Turns out if I put document.execCommand somewhere before the promise is executed then it seems to work. BUT it doesn't work on codepen or here in the inline scripting engine (might be to do with iframes etc?). Could someone check my sanity please?

Doesn't work (for me) inline in this post
Doesn't work (for me) in codepen
Works (for me) on glitch

<!DOCTYPE html><htmllang="en"><head><script>functioncopyToClipboard(element) {
  document.execCommand("copy");  

  var text = document.querySelector(element).textContent;
  
  var output = document.getElementById("output");
  navigator.clipboard.writeText(text).then(function() {
    output.textContent = "worked";
  }, function() {
    output.textContent = "didn't work";
  });
}
</script></head><bodyonload="copyToClipboard('#p1')"><pid="p1">Text to copy on page load.</p><buttononclick="copyToClipboard('#p1')">
    Click to copy text
  </button><pid="output"></p></body></html>

Solution 2:

write the function on document.body.onload() or add event listener. document.body.addEventListener("load", copyToClipboard); or simply

<bodyonload=copyToClipboard('#p1')>
     ..
    </body>

Solution 3:

This will not work because the copy command has to be triggered by the user's action. See this post: https://w3c.github.io/editing/execCommand.html#dfn-the-copy-command

I guess this question is a duplicate of: Cannot use `document.execCommand('copy');` from developer console

Html5 Cafe

Javascript Copy Text To Clipboard Without Click Any Button On Page Load

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