teste.js

down vote
accepted
You could do it as follows:

<div data-myattr="hello"></div>
function countUp(){
    console.log('hello');
}

function executeFunctionFromData(){
    var d = 'countUp' // Save `data-myattr` to d; (Obviously, this is just a hardcoded value as an example)
    window[d](); // Execute the function.
}

<div data-in="countUp" data-type="function" data-number="300" data-delay="1000" data-duration="2s">

</div>


<script>

	function countUp(number, delay, duration) {

	}

</script>