JSFiddle - React, Tailwind, and code Playground

JavaScript

HeightDataTables = function (divList) {
    var sumDiv = 0;
    for (i = 0; i < divList.length; i++) {
        sumDiv += $(divList[i]).outerHeight(true);
    }
    alert(sumDiv);
    return ($(window).height() - sumDiv);
};

var divList = ["header", "#pageTitle"];
alert(HeightDataTables(divList));