JSFiddle - React, Tailwind, and code Playground

HTML

<div class="y_sums">
    <h1>sum1 – <span>0</span></h1>
    <h1>sum2 – <span>0</span></h1>
    <h1>sum3 – <span>0</span></h1>
</div>

JavaScript

var ysums=[123,456,789];
function Sum(ysums) {
	for(var i=0;i<ysums.length;i++){
  	$('.y_sums h1 span').eq(i).text(ysums[i]);
  }
}
Sum(ysums);