1.Full background ，例子如下：

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div class="full-background">
        ...
    </div>
</body>

</html>
<script>

</script>
<style>
    html,
    body {
        padding: 0;
        margin: 0;
    }

    .full-background {
        height: 100vh;
        width: 100%;
        background: url('./lwx.jpg') no-repeat;
        background-size: 100% 100%;
    }
</style>

developer.mozilla.org/en-US/docs/…

css背景全屏、jquery幻灯片和轮播图

1.Full background ，例子如下：

2.jquery幻灯片和轮播图，例子如下：