rem移动端自适应布局JS

window.onload = function(){//750为设计图宽度，640就写640，这样1rem = 100px
getRem(750,100)
};

window.onresize = function(){
getRem(750,100)
};

function getRem(pwidth,prem){
var html = document.getElementsByTagName(“html”)[0];
var oWidth = document.body.clientWidth || document.documentElement.clientWidth;
html.style.fontSize = oWidth / pwidth * prem + “px”;
}

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