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macbook loading screen

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HTML

CSS

body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: black;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.loading-container {
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.apple-logo {
    width: 60px;
    height: auto;
    margin-bottom: 20px;
    display: block;
}

.loading-bar-container {
    width: 140px;
    height: 4px;
    background-color: #666;
    border-radius: 2px;
    overflow: hidden;
    margin: 0 auto;
    display: block;
}

.loading-bar {
    width: 0;
    height: 100%;
    background-color: white;
}

.replay-btn {
    margin-top: 20px;
    padding: 10px 20px;
    background-color: #f0f0f5;
    border: none;
    border-radius: 20px;
    color: black;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

.replay-btn:hover {
    background-color: #e0e0eb;
    transform: scale(1.05);
    transition: transform 0.2s ease;
}

.show-replay {
    opacity: 1;
    pointer-events: all;
}

JS

const loadingBar = document.querySelector('.loading-bar');
const replayBtn = document.querySelector('.replay-btn');
let progress = 0;
let interval;

function resetAndStartLoading() {
    loadingBar.style.width = '0%';
    progress = 0;
    replayBtn.classList.remove('show-replay');
    startLoading();
}

function startLoading() {
    let loading = true;

function loadWithPauses() {
        if (loading) {
            progress += Math.random() * 3;
            loadingBar.style.width = progress + '%';

if (progress >= 100) {
                progress = 100;
                clearInterval(interval);
                replayBtn.classList.add('show-replay');
            }

if (Math.random() > 0.8) {
                loading = false;
                setTimeout(() => { loading = true; }, Math.random() * 1500 + 500);
            }
        }
    }

interval = setInterval(loadWithPauses, 100);
}

startLoading();

replayBtn.addEventListener('click', () => {
    resetAndStartLoading();
});