Get current FPS via TS

index.js

"use strict";
let fps = 1;
let times = [];
const debug = true;
const fpsLoop = (timestamp = 0, debug) => {
    while (times.length > 0 && times[0] <= timestamp - 1000) {
        times.shift();
    }
    times.push(timestamp);
    fps = times.length;
    if (debug) {
        console.log(fps);
    }
    requestAnimationFrame(fpsLoop);
};
requestAnimationFrame(fpsLoop);

index.ts

let fps: number = 1;

let times: any[] = [];

const debug: boolean = true;

const fpsLoop = (timestamp: number = 0, debug?: number | undefined) => {
    while (times.length > 0 && times[0] <= timestamp - 1000) {
        times.shift();
    }
    times.push(timestamp);
    fps = times.length;
    if (debug) {
        console.log(fps);
    }
    requestAnimationFrame(fpsLoop);
}

requestAnimationFrame(fpsLoop);