Before and after clean up

toggleFooter.new.js

import jQuery from 'jquery';

let tempHeight = '';

export default function footerInit () {
    jQuery('#FooterSwitch').on('click', toogle);
}

function toogle () {
    const $footer = jQuery('#Footer');
    const footerPosition = parseInt($footer.css('bottom'), 10);
    const isHidden = footerPosition < 0;

    if (isHidden) {
        show($footer);
    } else {
        hide($footer);
    }
}

function show ($element) {
    tempHeight = $element.css('bottom');
    $element.css('bottom', 0);
}

function hide ($element) {
    $element.css('bottom', tempHeight);
}

toggleFooter.old.js

import jQuery from 'jquery';

let tempHeight = '';

export default function FooterInit () {
    jQuery('#FooterSwitch').on('click', toogle);
}

function toogle (event) {
    const $footer = jQuery('#Footer');

    if (parseInt($footer.css('bottom'), 10) < 0) {
        tempHeight = $footer.css('bottom');
        $footer.css('bottom', 0);
    } else {
        $footer.css('bottom', tempHeight);
    }
}