MediaWiki:Common.js：修订间差异

2025年4月14日 (一) 13:44的版本

(function(){

window.snowflakes = window.snowflakes || [];


function createSnow(){
    const chars = ['🍀','☘️','🍃','🌿'];
    
    function spawn(){
        const flake = document.createElement('div');
        flake.style = `position:fixed;top:-30px;color:#fff;z-index:9999;
            pointer-events:none;user-select:none;font-size:${Math.random()*15+10}px;
            left:${Math.random()*100}%;opacity:${Math.random()*0.5+0.5};
            animation:snowFall ${Math.random()*8+5}s linear infinite`;
        flake.textContent = chars[Math.floor(Math.random()*chars.length)];
        document.body.appendChild(flake);
        snowflakes.push(flake);
    }

    
    setInterval(spawn, 500);
    setTimeout(() => { setInterval(spawn, 3000) }, 10000);
}


if(!document.getElementById('snowStyle')){
    const style = document.createElement('style');
    style.id = 'snowStyle';
    style.textContent = `@keyframes snowFall {
        0%{transform:translateY(-30px) rotate(0deg)}
        100%{transform:translateY(120vh) rotate(720deg)}
    }`;
    document.head.appendChild(style);
}


document.addEventListener('visibilitychange', () => {
    if(!document.hidden && snowflakes.length < 20) createSnow();
});


createSnow();
})();