JSFiddle - React, Tailwind, and code Playground

JavaScript

var prevWidth = null;

$(function(){
    prevWidth = $(window).width();
    console.log(prevWidth);
})

$(window).resize(function() {
    var newWidth = $(window).width();
    if(prevWidth <= 768 && newWidth > 768) {
        console.log(prevWidth);
        console.log(newWidth);
        console.log('bigger');
    }
    else if (prevWidth > 768 && newWidth <= 768) {
        console.log(prevWidth);
        console.log(newWidth);
        console.log('smaller');
    }

    prevWidth = newWidth;
});