JSFiddle - React, Tailwind, and code Playground
JavaScript
function startPattern() {
// Values at even indices (0, 2, 4, ...) specify vibrations, while the odd
// indices specify pauses.
// Vibrate for 500ms 6 times, pausing for 250ms in between each one.
console.log('startPattern');
navigator.vibrate([500, 250, 500, 250, 500, 250, 500, 250, 500, 250, 500]);
}
var supportsVibrate = "vibrate" in navigator;
alert(supportsVibrate)
startPattern();