rem自适应js代码

var computedFz = (function(){
　　var designWidth = 375, rem2px = 100;
　　function computedFz(){
	var fz = Math.floor(window.innerWidth / designWidth * rem2px);
	document.documentElement.style.fontSize = (fz > 100 ? 100 : fz) + ‘px‘
　　}
	return computedFz;
})()
computedFz();
window.onresize = function(){
　　setTimeout(computedFz,500);
}