const setRemUnit = () => { const docEl = document.documentElement; // IPhone6下750像素来设计，实际像素375px，1rem为50px const rem = docEl.clientWidth / 7.5;
docEl.style.fontSize = `${rem}px`; };
const pageShowCallback = (e) => { if (e.persisted) { setRemUnit(); } };
document.addEventListener(\'DOMContentLoaded\', setRemUnit, false);
// reset rem unit on page resize window.addEventListener(\'resize\', setRemUnit, false);
// reset rem unit on page show window.addEventListener(\'pageshow\', pageShowCallback, false);
export default setRemUnit;  

直接引入main.js里面就好了

 

 大神们。如果有更好的方法，欢迎指导