JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <ul>
    <li data-1="Bla BLa" data-2="bla/bla">1</li>
<li data-1="Bla1 BLa1" data-2="bla1/bla1">2</li>
<li data-1="Bla2 BLa2" data-2="bla2/bla2">3</li>
    </ul>
</div>

CSS

.highlight {
    background-color: red;
}

JavaScript

var test="[[bla/bla,Bla BLa],[bla1/bla1,Bla1 BLa1]]",
    selector = test.substr(2, test.length - 4).split("],[")
.map(function(item) {
    item = item.split(",");
    return "[data-1='" + item[1] + "'][data-2='" + item[0] + "']";
}).join(",");

console.log(selector);

var items = $(selector, "#container");

console.log(items);
items.addClass("highlight");