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Re-allow clipboard copy on non-https sites (#17118)

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* Re-allow clipboard copy on non-https sites
* fallback clipboard functions
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Netduma Luke M 2021-10-19 11:22:16 +01:00 committed by GitHub
parent eaf493be5d
commit 9f3d5c0a23
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1 changed files with 32 additions and 1 deletions
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33
web_src/js/features/clipboard.js
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@ -16,6 +16,33 @@ function onError(btn) {
btn.dataset.content = btn.dataset.original;
}
/**
* Fallback to use if navigator.clipboard doesn't exist.
* Achieved via creating a temporary textarea element, selecting the text, and using document.execCommand.
*/
function fallbackCopyToClipboard(text) {
if (!document.execCommand) return false;
const tempTextArea = document.createElement('textarea');
tempTextArea.value = text;
// avoid scrolling
tempTextArea.style.top = 0;
tempTextArea.style.left = 0;
tempTextArea.style.position = 'fixed';
document.body.appendChild(tempTextArea);
tempTextArea.select();
// if unsecure (not https), there is no navigator.clipboard, but we can still use document.execCommand to copy to clipboard
const success = document.execCommand('copy');
document.body.removeChild(tempTextArea);
return success;
}
export default function initGlobalCopyToClipboardListener() {
document.addEventListener('click', async (e) => {
let target = e.target;
@ -33,7 +60,11 @@ export default function initGlobalCopyToClipboardListener() {
await navigator.clipboard.writeText(text);
onSuccess(target);
} catch {
onError(target);
if (fallbackCopyToClipboard(text)) {
onSuccess(target);
} else {
onError(target);
}
}
break;
}