JSFiddle - React, Tailwind, and code Playground
HTML
<span class="myID">a</span>
<span class="myID">b</span>
<span class="myID">c</span>
<span class="myID">d</span>
<span class="myID">e</span>
<p id="result"></p>
JavaScript
var x = '';
$('.myID').each(function(index){
x += ' '+$(this).position().left+',';
});
alert(x);