JSFiddle - React, Tailwind, and code Playground

JavaScript

var content = jQuery('#content');
var sidebar_ads = jQuery('#sidebar1').find('.widget_text');
var show_ads = {};

if (height < 600) {
    show_ads[1] = true;
} else if (height >= 600 && height < 1000) {
    show_ads[1] = true;
    show_ads[2] = true;
} else {
    show_ads[1] = true;
    show_ads[3] = true;
}

for(var i=0; i<sidebar_ads.length; i++) {
    if (typeof show_ads[i+1] === 'undefined' || show_ads[i+1] !== true) {
         sidebar_ads[i].hide();
    }
}