ThrottledQueue.ts

export class ThrottledQueue {
    private isThrottling = false;
    private items: (() => void)[] = [];

    constructor(private duration: number) {
    }

    run(item: () => void) {
        this.items.push(item);
        this.attemptExecute();
    }

    private attemptExecute() {
        if (!this.isThrottling && this.items.length > 0) {
            this.execute();
        }
    }

    private execute() {
        this.triggerThrottling();
        this.runFirstItem();
    }

    private triggerThrottling() {
        this.isThrottling = true;

        setTimeout(() => {
            this.isThrottling = false;
            this.attemptExecute();
        }, this.duration);
    }

    private runFirstItem() {
        this.items[0]();
        this.items.shift();
    }
}

Example use:

let queue = new ThrottledQueue(100);
for (let i = 0; i < 50; i++) {
    queue.run(() => console.log(new Date()));
}

Which will output the date 50 times every 100ms