meidosafe/public/js/appearance.js

axios.defaults.withCredentials = true;

let appearance = {};

appearance.sheetElement = null;

appearance.prepare = () => {
    appearance.sheetElement = document.getElementById('appearance-sheet');
    let lightbulb = document.getElementById('appearance-switch');
    lightbulb.addEventListener('click', appearance.toggleLightMode);
};

appearance.toggleLightMode = (e) => {
    e.preventDefault();

    axios.post('/api/appearance/toggle').then(res => {
        let newStyle = res.data.currentStyle;
        appearance.sheetElement.setAttribute("href", `/css/style_${newStyle}.css`);
        appearance.currentStyle = newStyle;
    });
};

window.addEventListener('load', () => {
    appearance.prepare();
});