JSFiddle - React, Tailwind, and code Playground

HTML

<div class="mtime">7:50</div>

JavaScript

$('.mtime').each(function() {
        var time = $(this).text();
        
        var date = new Date();
        
        date = new Date(date.toDateString() + ' ' + time + ' UTC')
        $(this).text(date.getHours() + ':' + date.getMinutes());
    });