JSFiddle - React, Tailwind, and code Playground

HTML

<div customAttr="12" title="me"></div>
<div anotherAttr="Bear"></div>
<div yetAnotherAttr="Elephant"></div>

CSS

div{
width: 100px;
    height: 100px;
    background-color: red;
}
.selected{
background-color: green;
}

JavaScript

var m = /another/i;

$('div').each(function(){
    var $this = $(this);
    $.each(this.attributes,function(){
        if (this.name.match(m)){
            $this.addClass('selected');
            $this.text(this.name + ' : ' + this.value); //or use its custom-attribute's value
        }
    });
});