JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <div data-myAttr = "foo">div 1</div>
    <div data-myAttr = "bar">div 2</div>
</div>
<div>
    <div data-myAttr = "no">div 3</div>
    <div data-myAttr = "no">div 4</div>
</div>
<div>
    <div data-myAttr = "foo">div 5</div>
    <div data-myAttr = "bar">div 6</div>
</div>

JavaScript

$('[data-myAttr=foo], [data-myAttr=bar]').each(function(){
  alert($(this).text());  
})