html5动态圣诞树代码

HTML5动态圣诞树代码

!DOCTYPE html>
    html>
    head>
    meta charset="utf-8">
    title>
    HTML5动态圣诞树代码/title>
    style>
#tree {
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -200px;
    margin-left: -150px;
    width: 300px;
    height: 400px;
    border-left: 10px solid brown;
    border-right: 10px solid brown;
    border-bottom: 10px solid brown;
    border-radius: 50% 50% 0 0;
    background-color: #01796F;
}
#tree::before {
    content: "";
    position: absolute;
    top: -50px;
    left: -30px;
    width: 0;
    height: 0;
    border-left: 60px solid transparent;
    border-right: 60px solid transparent;
    border-bottom: 50px solid brown;
    border-radius: 50% 50% 0 0;
}
#tree::after {
    content: "";
    position: absolute;
    bottom: -100px;
    left: -50px;
    width: 0;
    height: 0;
    border-left: 100px solid transparent;
    border-right: 100px solid transparent;
    border-top: 150px solid #008080;
}
.decoration {
    position: absolute;
    border-radius: 50%;
}
.decoration.red {
    height: 20px;
    width: 20px;
    background-color: red;
    box-shadow: 0 0 10px 3px red;
}
.decoration.yellow {
    height: 15px;
    width: 15px;
    background-color: yellow;
    box-shadow: 0 0 10px 3px yellow;
}
.decoration.blue {
    height: 10px;
    width: 10px;
    background-color: blue;
    box-shadow: 0 0 10px 3px blue;
}
.decoration.green {
    height: 5px;
    width: 5px;
    background-color: green;
    box-shadow: 0 0 10px 3px green;
}
    /style>
    /head>
    body>
    div id="tree">
    /div>
    script>
function addDecoration() {
    var decorationTypes = [".red", ".yellow", ".blue", ".green"];
    var randomDecoration = decorationTypes[Math.floor(Math.random() * decorationTypes.length)];
    var decoration = document.createElement("div");
    decoration.className = "decoration" + randomDecoration;
    decoration.style.left = Math.floor(Math.random() * 250) + "px";
    decoration.style.top = Math.floor(Math.random() * 350) + "px";
    document.getElementById("tree").appendChild(decoration);
}
    setInterval(addDecoration, 500);
    /script>
    /body>
    /html>
    

上述代码就是一个利用HTML5技术实现动态效果的圣诞树页面，它采用的技术包括HTML、CSS和JavaScript。在HTML中，我们定义了一个id为tree的div元素，作为圣诞树的主体。我们使用CSS设置了圣诞树的外观，包括颜色、形状和边框等；同时，我们还定义了装饰品的样式，包括颜色和大小等。在JavaScript中，我们使用setInterval方法循环调用addDecoration函数，用于向圣诞树上不断添加随机颜色的装饰品。整个页面设计简洁，效果炫酷，是一个很好的HTML5练手项目。

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