近年來，滿屏飄雪花特效在網(wǎng)頁設(shè)計中越來越受歡迎。它可以為網(wǎng)站增添節(jié)日氣氛或者增強(qiáng)用戶體驗(yàn)。下面我們來介紹如何實(shí)現(xiàn)html滿屏飄雪花特效。
<!DOCTYPE html>
<html>
<head>
<title>滿屏飄雪花特效</title>
<meta charset="utf-8">
</head>
<body>
<canvas id="snow" style="position:absolute;left:0;top:0"></canvas>
<script>
var width, height, canvas, ctx, snow, snowflakes = [];
function init() {
canvas = document.getElementById('snow');
ctx = canvas.getContext('2d');
width = canvas.width = window.innerWidth;
height = canvas.height = window.innerHeight;
createSnowflakes(500);
update();
}
function createSnowflakes(amount) {
for (var i = 0; i < amount; i++) {
snowflakes.push({
x: Math.random() * width,
y: Math.random() * height,
r: Math.random() * 5 + 2,
d: Math.random() * amount
});
}
}
function update() {
ctx.clearRect(0, 0, width, height);
for (var i = 0; i < snowflakes.length; i++) {
var snowflake = snowflakes[i];
ctx.beginPath();
ctx.arc(snowflake.x, snowflake.y, snowflake.r, 0, Math.PI * 2);
ctx.fillStyle = '#fff';
ctx.fill();
snowflake.y += Math.pow(snowflake.r, 0.9);
snowflake.x += Math.cos(snowflake.d) * 0.1;
if (snowflake.y > height) {
snowflake.y = -10;
snowflake.x = Math.random() * width;
}
}
requestAnimationFrame(update);
}
window.addEventListener('load', init);
</script>
</body>
</html>以上就是實(shí)現(xiàn)html滿屏飄雪花的代碼。我們可以通過改變createSnowflakes函數(shù)中的參數(shù)來控制雪花的數(shù)量。如果需要添加更多元素，可以修改snowflake對象的屬性。