JSFiddle - React, Tailwind, and code Playground

HTML

<div>Some reallllly

realllyyy long text</div>

<div>Some other
div
</div>

JavaScript

$.expr[":"].mycontains = $.expr.createPseudo(function(arg) {
    return function( elem ) {
        return $(elem).text().replace(/(\n)+/g, " ").indexOf(arg) >= 0;
    };
});

$(document).ready(function(){
    $('div:contains("other")').css('color', 'green');
    $('div:contains("Some other div")').css('border', '1px solid blue');
    $('div:mycontains("Some reallllly realllyyy long text")').css('color', 'red');
    $('div:mycontains("Some other div")').css('border', '1px dashed blue');
});