AudioSelector.js

(async function () {
	try {
		await navigator.mediaDevices.getUserMedia({audio: true});
	} catch (e) {
		alert('Failed to initialize media devices.');
	}
	let popupParent = document.createElement('div');
	/* positioning for the dialog */
	popupParent.style.width = '320px';
	popupParent.style.height = '120px';
	popupParent.style.position = 'fixed';
	popupParent.style.left = '50%';
	popupParent.style.top = '50%';
	popupParent.style.marginLeft = '-160px';
	popupParent.style.marginTop = '-60px';
	/* stylizing the dialog */
	popupParent.style.backgroundColor = '#fff';
	popupParent.style.border = '1px solid rgba(0, 0, 0, .08)';
	popupParent.style.zIndex = '999999';

	/* navigation bar */
	let navbar = document.createElement('div');
	navbar.style.width = '100%';
	navbar.style.height = '28px';
	navbar.style.backgroundColor = 'rgba(0, 0, 0, .05)';

	let closeButton = document.createElement('button');
	closeButton.innerText = 'Close';
	closeButton.style.padding = '6px 8px';
	closeButton.style.backgroundColor = 'transparent';
	closeButton.style.color = 'black';
	closeButton.style.position = 'absolute';
	closeButton.style.right = '0';
	closeButton.style.top = '0';
	closeButton.style.border = 'none';

	navbar.appendChild(closeButton);

	closeButton.onclick = function (e) {
		popupParent.parentNode.removeChild(popupParent);
	};
	closeButton.onmouseover = function (e) {
		e.target.style.backgroundColor = '#e74c3c';
		e.target.style.color = 'white';
	};
	closeButton.onmouseleave = function (e) {
		e.target.style.backgroundColor = 'transparent';
		e.target.style.color = 'black';
	};

	/* PLEASE DO NOT REMOVE CREDIT LINE */
	let popupTitle = document.createElement('div');
	popupTitle.innerHTML = "SoundSwitcher - by <a href='https://north.studio' target='_blank'>NorthStudio</a>";
	popupTitle.style.fontSize = '12px';
	popupTitle.style.position = 'absolute';
	popupTitle.style.left = '6px';
	popupTitle.style.top = '8px';
	navbar.appendChild(popupTitle);

	let titleLink = popupTitle.querySelector('a');
	titleLink.style.fontWeight = '500';
	titleLink.style.textDecoration = 'none';


	let popupContent = document.createElement('div');
	popupContent.style.height = '92px';
	popupContent.style.display = 'relative';
	popupContent.style.width = '100%';

	let bottomArea = document.createElement('div');
	bottomArea.style.position = 'absolute';
	bottomArea.style.left = '10px';
	bottomArea.style.right = '10px';
	bottomArea.style.bottom = '10px';

	let submitButton = document.createElement('button');
	submitButton.style.backgroundColor = '#3498db';
	submitButton.style.color = '#FFF';
	submitButton.style.width = '100%';
	submitButton.style.padding = '6px';
	submitButton.style.border = 'none';
	submitButton.style.borderRadius = '3px';
	submitButton.innerText = 'Set Device';

	submitButton.onclick = function (e) {
		document.querySelectorAll('audio,video').forEach(el => {
			el.setSinkId(deviceSelector.value);
		});
	};

	bottomArea.appendChild(submitButton);


	let deviceSelector = document.createElement('select');
	navigator.mediaDevices.enumerateDevices().then(devices => {
		devices = devices.filter(x => x.kind === 'audiooutput');
		devices.forEach(device => {
			let choice = document.createElement('option');
			choice.innerText = device.label;
			choice.value = device.deviceId;
			deviceSelector.appendChild(choice);
		});
		popupContent.appendChild(deviceSelector);
	});

	deviceSelector.style.margin = '10px';
	deviceSelector.style.padding = '5px';
	deviceSelector.style.width = 'calc(100% - 20px)';


	popupContent.appendChild(bottomArea);



	popupParent.appendChild(navbar);
	popupParent.appendChild(popupContent);
	document.body.appendChild(popupParent);
})();

Mình fix rồi nhé, bạn thử lại xem sao.