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function setUp(){
  
    // Save the h3 element
    var element = document.getElementById("initial");

    // Create setInterval, save to variable to clear later
    var timer = setInterval(function() {
         
        // Current element value
        var value = element.innerHTML;
        
        // Decrease
        value--;
        
        // Set value
        element.innerHTML = value;
        
        // Clear if we're at 0
        if (value === 0) {
            clearTimeout(timer);
        }
    }, 1000);
}

<button onclick="setUp()">Activate timer</button>
<h3 id="initial">60</h3>

Hello, Thanks for your code.

I want to add a "Stop timer" Button to this code. How do I do that?
I also want the countdown to start from 60 seconds when I click the "Activate timer" Button again? Please help. Thanks in advance.

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Posted by: Jon Brown

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