JSFiddle - React, Tailwind, and code Playground

HTML

<pre class="">
    <span style="padding-right: 0.1px;">
        <span class="cm-operator">=</span>
        <span class="cm-operator interactive-linter-warning">===</span>
        <span class="cm-operator interactive-linter-warning interactive-linter-error">===</span>
    </span>
</pre>

JavaScript

console.log($("pre").filter(function() {
    return $(this).text().replace(/\s/g, "") === "=======";
}).get());