How to create a CountUp between two numbers with Jquery?

To replicate what you have in the GIF, you could create a simple 1-second interval that changes the value of an element’s textContent property. Below is a simple approach. You should update it to make sure the start value and end value are valid, etc.

// Specify a selector, start/end numbers, and increment size
graduallyIncrement(".number", 1234, 1498, 15);

function graduallyIncrement ( selector, start, end, incrementBy ) {

    // Start with an initial value, and an element reference
    let currentValue = start;
    let element = document.querySelector(selector);
  
    // Update our element to show our initial value
    element.textContent = currentValue.toLocaleString();
  
    // Create an interval to run every 1 second
    let interval = setInterval(() => {

        // Determine next number. This may be our current
        // number + 15, or it may be the end number.
        let nextNumber = Math.min(end, currentValue += incrementBy);
    
        // Update our element to show the new number
        element.textContent = nextNumber.toLocaleString();
    
        // Determine whether or not to stop updating
        if ( nextNumber === end ) {
          clearInterval(interval);
        }
  
    }, 1000);

}

<div class="number">1,243,234</div>

Other ways to improve would be to make this a Promise, which resolves when the final number is met. Or pass it a callback function which can be called once the process is complete. Here’s how you could use Promises to determine when the counting has completed:

graduallyIncrement(".number", 1234, 1498, 15).then(() => {
    alert("Done counting!");
});

async function graduallyIncrement(selector, current, end, incrementBy) {

    // Start with an initial value, and an element reference
    let element = document.querySelector(selector);

    // Update our element to show our initial value
    element.textContent = current.toLocaleString();

    return new Promise(resolve => {

        // Create an interval to run every 1 second
        let interval = setInterval(() => {

            // Determine next number. This may be our current
            // number + 15, or it may be the end number.
            current = Math.min(end, current += incrementBy);

            // Update our element to show the new number
            element.textContent = current.toLocaleString();

            // Using a setTimeout lets the textContent update
            // complete before we show our ALERT
            setTimeout(() => {
                // Determine whether or not to stop updating
                if (current === end) {
                    clearInterval(interval);
                    resolve();
                }
            }, 0);

        }, 1000);

    });

}