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Re-allow clipboard copy on non-https sites (#17118)
* Re-allow clipboard copy on non-https sites * fallback clipboard functions
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1 changed files with 32 additions and 1 deletions
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@ -16,6 +16,33 @@ function onError(btn) {
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btn.dataset.content = btn.dataset.original;
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}
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/**
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* Fallback to use if navigator.clipboard doesn't exist.
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* Achieved via creating a temporary textarea element, selecting the text, and using document.execCommand.
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*/
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function fallbackCopyToClipboard(text) {
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if (!document.execCommand) return false;
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const tempTextArea = document.createElement('textarea');
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tempTextArea.value = text;
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// avoid scrolling
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tempTextArea.style.top = 0;
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tempTextArea.style.left = 0;
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tempTextArea.style.position = 'fixed';
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document.body.appendChild(tempTextArea);
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tempTextArea.select();
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// if unsecure (not https), there is no navigator.clipboard, but we can still use document.execCommand to copy to clipboard
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const success = document.execCommand('copy');
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document.body.removeChild(tempTextArea);
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return success;
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}
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export default function initGlobalCopyToClipboardListener() {
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document.addEventListener('click', async (e) => {
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let target = e.target;
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@ -33,7 +60,11 @@ export default function initGlobalCopyToClipboardListener() {
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await navigator.clipboard.writeText(text);
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onSuccess(target);
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} catch {
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onError(target);
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if (fallbackCopyToClipboard(text)) {
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onSuccess(target);
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} else {
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onError(target);
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}
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}
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break;
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}
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