demo · v133
ClipboardItem with Promise
Click "write" to copy text via a ClipboardItem whose values are Promise<DOMString>. The promise resolves only at write time. Useful when the text needs an async fetch or expensive serialisation.
checking support...
the code
// Chrome 133+: the value can be a Promise that resolves to a DOMString.
const item = new ClipboardItem({
"text/plain": (async () => {
await new Promise(r => setTimeout(r, 50));
return "Hello at " + new Date().toISOString();
})(),
});
await navigator.clipboard.write([item]);