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<h2>Snackbar / Toast</h2>
<p>在屏幕底部弹出消息,作用与使用方法都与Toast类似</p>
<p>点击按钮显示提示信息，3 秒后消失</p>

<button onclick="myFunction()">显示 Snackbar</button>

<div id="snackbar">一些文本..</div>
<style>
    #snackbar {
        visibility: hidden;
        min-width: 250px;
        margin-left: -125px;
        background-color: #333;
        color: #fff;
        text-align: center;
        border-radius: 2px;
        padding: 16px;
        position: fixed;
        z-index: 1;
        left: 50%;
        bottom: 30px;
        font-size: 17px;
    }
    
    #snackbar.show {
        visibility: visible;
        -webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
        animation: fadein 0.5s, fadeout 0.5s 2.5s;
    }
    
    @-webkit-keyframes fadein {
        from {bottom: 0; opacity: 0;} 
        to {bottom: 30px; opacity: 1;}
    }
    
    @keyframes fadein {
        from {bottom: 0; opacity: 0;}
        to {bottom: 30px; opacity: 1;}
    }
    
    @-webkit-keyframes fadeout {
        from {bottom: 30px; opacity: 1;} 
        to {bottom: 0; opacity: 0;}
    }
    
    @keyframes fadeout {
        from {bottom: 30px; opacity: 1;}
        to {bottom: 0; opacity: 0;}
    }
</style>

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