JSFiddle - React, Tailwind, and code Playground

by antyrat

HTML

<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 1</li>
</ul>

JavaScript

$('ul > li').each(function(){
    var current = this;
    $('ul').find('li:contains(' + $(this).html() + ')').each(function(){
        if(current != this) {
            $(this).css('color', 'red');
        }
    });
});