JS判别是否为X以上刘海屏：
const isIphonex = () => { // X XS, XS Max, XR,11,11Pro,11Pro Max
const xSeriesConfig = [{
devicePixelRatio: 3,
width: 375,
height: 812,
},
{
devicePixelRatio: 3,
width: 414,
height: 896,
},
{
devicePixelRatio: 2,
width: 414,
height: 896,
},
]; // h5
if (typeof window !== 'undefined' && window) {
const isIOS = /iphone/gi.test(window.navigator.userAgent);
if (!isIOS) return false;
const {
devicePixelRatio,
screen
} = window;
const {
width,
height
} = screen;
let flag = xSeriesConfig.some(item => item.devicePixelRatio === devicePixelRatio && item.width === width && item.height === height);
return flag;
}
return false;
}
