在做 h5 展示页面的时候 考虑到许多 css 样式在横屏会出现布局错乱, 为防止提示用户横屏显示
demo 介绍
使用 onorientationchange 事件 + animation 动画;
html
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| <div id="tip">
<i class="icon"></i>
<p>为了更好的体验，请使用竖屏浏览</p>
</div>
|
css
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| #tip {
position: absolute;
top: 0;
left: 0;
z-index: 999;
width: 100vw;
height: 100vh;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
background-color: rgba(0, 0, 0, 1);
}
.icon {
display: inline-block;
width: 67px;
height: 109px;
background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAIYAAADaCAMAAABU68ovAAAAXVBMVEUAAAD29vb////x8fH////////x8fH5+fn29vby8vL////5+fn39/f6+vr////x8fH////////+/v7////09PT////x8fH39/f////////////////////x8fH///+WLTLGAAAAHXRSTlMAIpML+gb4ZhHWn1c2gvHBvq1uKJcC6k8b187lQ9yhhboAAAQYSURBVHja7d3blpowFIDhTUIAOchZDkre/zE7ycySrbUUpsRN2/1fzO18KzEqxEVgTiZNfgmmtxRc8iaR8HNe8x4BtjQePKayYCIoyBSgvNNE1AkNSHqZyLqk97EgUCCHBzZ5mkg7ScvIJuIyOyXBRFxgpqWZyGsAZLB1KjsJi8nutHU4JCRbFRH8tmirI9k8Jx2sqNs8K/m0LQkrktO2crgcgXGB4AiTEsB0hJfo9MGgX7CGcYiYwQxmMOOvZwRhBG8tCoMXjBDeXvWCEcHbi14wgCBmMIMZzGAGM5jxETNwzMAxA8cMHDNwzMAxA8cMHDNwzMAxA8cMHDNwzMAxY6E2rUQxnH2tz9cirlJFwFBJedaPnUv0M7++egPDE8iAJcIDmxwH5wwv9vUviw2kLbVO3TJU5uul/EyB0FoLp4x60PdGUd3qPurrWyjGGTc05u+1dcgI7/+tCCPARWGhH7o5Y7RCf+bH9ctXLp6v2BVDxfqz0oPXeSVaNtINo/1SXDv4dck8IIkbhtC2ol+iouEonTBCbYvVMnXOjxww6s/RFrBUpXHh/gw1rHj5d/qhYn9Gpk2FWh6xRBRX5Oj3Znh2Sq49/L6+y8pB26q9GbE2dbA2mVbx6I+7MfBglLCttm73ZQi7AD3iL4HqjFYJHSPRppqaUaJ3ATpGa+ckpGak2hRRMyqjGMkvl+xyFeSMwjAqcsZgGDdyhl0oNTnDN4yenJGZFGxNChP5/Y3efh6SM2rDOJMzboYxkDMqwyjIGcIw6F+io2FU1IxIm1JqRmgXSkvNKNCXeTpGrU0JNSO2c6LIGPgCS8AuDHz9ta0SXWDtxoDRH+MqlbC2Dt2G2JFRadtQZt2qq/orGowdGb2euxYiqWEpVWhTBnszoNAPdStuQwxqf0aocdWKW4Z+DfszIh8pxJqbuCE4YAC+4bm0evtipjpgJHeFnyyt1Ku2xa0bhjxr27p75rECNwyI9ZwvXkHq+7aTaMEV44YYy/spfgjgjNHaWW+GeUhGEX7tLlVinIFDDSgnOwhi1V6bU0b6tVS9eAERe863g4dRrtiHdc6o+nn5vtyVVgR79Cqt4uL6gfHPQyGqtP2vf7HADGbcYwaOGThm4JiBYwaOGThm4JiBYwaOGThm4JiBYwaOGThm4JiBYwaOGThm4JjhtOM+J/AgT008yDMkN/dPP9hzS8zAMQN3OEYeekp5YU7KOKXwVXqiY+QS7smcinGKABWdiBgpPJTSMHJ4KidhhPBUSMLw4CmPhKHgKUXCkHsygum71ftNSgCX6bsl8FQyfbcL5EdYsDk0R3j7aiA5wpt5AjKg/2gLJEBD/0Hf2OOf/vRrj6z/7GtP4B3nMKyjHA12kIPSjnJs3FEO0TvKkYJHOWCR+rjJH0Vn6fI5PjNbAAAAAElFTkSuQmCC');
transform: rotate(90deg);
animation: rotation infinite 1.5s ease-in-out;
background-size: 67px 109px;
margin-bottom: 2em;
}
#tip p {
color: white;
font-size: 2em;
}
@keyframes rotation {
10% {
transform: rotate(90deg);
}
50% {
transform: rotate(0);
}
60% {
transform: rotate(0);
}
90% {
transform: rotate(90deg);
}
100% {
transform: rotate(90deg);
}
}
|
JavaScript
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| (function screenStatus() {
const element = document.querySelector('#tip');
element.style.visibility = 'hidden';
const status =
'onorientationchange' in window ? 'orientationchange' : 'resize';
window.addEventListener(status, e => {
if (window.orientation === 180 || window.orientation === 0) {
element.style.visibility = 'hidden';
}
if (window.orientation === 90 || window.orientation === -90) {
element.style.visibility = 'visible';
}
});
})();
|