Beep javascript

beep.ts

function beep() {
	const ctx = new AudioContext();
	const oscillator = ctx.createOscillator();
	const gainNode = ctx.createGain();

	oscillator.connect(gainNode);
	gainNode.connect(ctx.destination);

	gainNode.gain.value = 0.25;
	oscillator.frequency.value = 350;
	oscillator.type = "triangle";

	oscillator.start();

	setTimeout(() => oscillator.stop(), 90);
}