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function fn(){
console.log(11111);
function setHtmlFontSize() {
let whdef = 100 / 1920 ;
let bodyWidth = document.documentElement.getBoundingClientRect().width;
console.log(bodyWidth,'屏幕宽度')
let rem = bodyWidth * whdef
document.getElementsByTagName('html')[0].style.fontSize = rem + 'px'
}
setHtmlFontSize()
window.addEventListener('resize',function(){
setTimeout(function(){
setHtmlFontSize()
},100)
})
}
fn()