the-glorious-startpage/js/dock-buttons.js

var dock = document.getElementById('dock');

// Create mouse event for passed div
const addMouseUpEvent = (li, url) => {
    li.onmouseup = () => {
        window.location.href = encodeURI(url);
    }
}

// Generate button from user
const generateFromManual = (id, icon, callback) => {

    var customButtonCallback;

    var dockButton = document.createElement('div');
    dockButton.id = 'button' + id;
    dockButton.className = 'dockButton';
    
    dockButton.onmouseup = callback;
    
    var buttonImage = document.createElement('div');
    buttonImage.id = 'buttonImage' + id;
    buttonImage.className = 'dockButtonImage';
    buttonImage.style.background = "url('assets/buttons/" + icon + ".svg')";
    buttonImage.style.backgroundSize = 'cover';

    dockButton.appendChild(buttonImage);
    dock.appendChild(dockButton);
}

// Create callback event for onmouse up
const addCallbackEvent = (element, callback) => {
    element.onmouseup = callback;
}

// Generate buttons from array
const generateFromList = () => {

    for (i = 0; i < (dockSites.length); i++) {

        var site = dockSites[i].site;
        var icon = dockSites[i].icon;
        var url = dockSites[i].url;

        var dockButton = document.createElement('div');
        dockButton.id = 'button' + i;
        dockButton.className = 'dockButton';
        addMouseUpEvent(dockButton, url);

        var buttonImage = document.createElement('div');
        buttonImage.id = 'buttonImage' + i;
        buttonImage.className = 'dockButtonImage';
        buttonImage.style.background = "url('assets/webcons/" + icon + ".svg')";
        buttonImage.style.backgroundSize = 'cover';

        // Append divs
        dockButton.appendChild(buttonImage);
        dock.appendChild(dockButton);
    };
}

const populateDock = () => {
    
    // Create launcher button
    generateFromManual(
        'Launch',
        'launch', 
        () => {
            // Toggle web pad
            alert('toggle web pad');
        }
    );

    // Create dock buttons fetched from sites-list.js
    generateFromList();

    // Create weather button
    generateFromManual(
        'Weather',
        'weather', 
        () => {
            alert('toggle weather creen');
        }
    );

    // Create menu button
    generateFromManual(
        'Dashboard',
        'dashboard', 
        () => {
            // Toggle dashboard
            alert('toggle dashboard');
        }
    );

}

// Populate dock
window.onload =  populateDock();