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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="background.js"></script>
</head>
<body>
<textarea id="ta"></textarea>
</body>
</html>
'use strict';
function getClipboard() {
var result = null;
var textarea = document.getElementById('ta');
textarea.value = '';
textarea.select();
if (document.execCommand('paste')) {
result = textarea.value;
} else {
console.error('failed to get clipboard content');
}
textarea.value = '';
return result;
}
function setClipboard(value) {
var result = false;
var textarea = document.getElementById('ta');
textarea.value = value;
textarea.select();
if (document.execCommand('copy')) {
result = true;
} else {
console.error('failed to get clipboard content');
}
textarea.value = '';
return result;
}
chrome.runtime.onMessageExternal.addListener(function(request, sender, sendResponse) {
switch (request.method) {
case 'getClipboard':
sendResponse(getClipboard());
break;
case 'setClipboard':
sendResponse(setClipboard(request.value));
break;
default:
console.error('Unknown method "%s"', request.method);
break;
}
});
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title></title>
<meta name="description" content="">
<meta name="viewport" content="width=device-width">
</head>
<body>
<h4>Current Clipboard Text:</h4>
<p id="clipboard-content"></p>
<hr>
<button id="copyButton">Set System Clipboard To The Following:</button>
<p id="para">Ut scelerisque posuere sem, non aliquam ipsum sodales et. Fusce luctus, mauris ut volutpat varius, leo dui posuere ligula, vitae rhoncus leo ipsum eu neque.</p>
<script src="main.js"></script>
</body>
</html>
'use strict';
var extensionId = 'YOUR EXTENSION ID HERE';
document.getElementById('copyButton').addEventListener('click', function() {
var text = document.getElementById('para').textContent;
chrome.runtime.sendMessage(
extensionId,
{ method: 'setClipboard', value: text },
function(response) {
console.log('extension setClipboard response', response);
}
);
});
document.addEventListener('DOMContentLoaded', function() {
readClipboard();
// Re-read the clipboard every time the page becomes visible.
document.addEventListener('visibilitychange', function() {
if (!document.hidden) {
readClipboard();
}
});
});
function readClipboard() {
chrome.runtime.sendMessage(
extensionId,
{ method: 'getClipboard' },
function(response) {
document.getElementById('clipboard-content').textContent = response;
console.log('extension getClipboard response', response);
}
);
}
{
"manifest_version": 2,
"name": "Copy clipboard.",
"description": "Copy clipboard programmatically at any time.",
"version": "1.0",
"background": {
"persistent": false,
"page": "background.html"
},
"permissions": [
"clipboardRead",
"clipboardWrite"
],
"externally_connectable": {
"matches": [
"http://localhost/*"
]
}
}
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