How Can You Control and Track Timeouts in JavaScript?

Pausing and Resuming Timeouts in JavaScript

How to pause and resume a setTimeout() timeout?

You can wrap the window.setTimeout function to create a custom timer that supports pausing and resuming.

<code class="javascript">var Timer = function(callback, delay) {
    var timerId, start, remaining = delay;

    this.pause = function() {
        window.clearTimeout(timerId);
        timerId = null;
        remaining -= Date.now() - start;
    };

    this.resume = function() {
        if (timerId) {
            return;
        }

        start = Date.now();
        timerId = window.setTimeout(callback, remaining);
    };

    this.resume();
};</code>

How to get the time remaining on the current timeout?

You can use the remaining property of the custom timer to get the time remaining on the current timeout.

<code class="javascript">var timer = new Timer(function() {
    alert("Done!");
}, 1000);

console.log("Time remaining:", timer.remaining); // Output: 1000</code>

Example usage:

<code class="javascript">timer.pause();
// Do some stuff...
timer.resume();</code>

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