移动端适配

//rem适配 !(function () { let width = document.documentElement.clientWidth; let styleNode = document.createElement('style'); styleNode.innerHTML = 'html{font-size: ' + width / 10 + 'px !important;}'; document.head.appendChild(styleNode); })();

// 根据设计稿的宽度来传参 比如640 750 1125
!function(designWidth){
	if (/Android(?:s+|/)(d+.d+)?/.test(navigator.userAgent)) {
		var version = parseFloat(RegExp.$1);
		if (version > 2.3) {
			var phoneScale = parseInt(window.screen.width) / designWidth;
			document.write('<meta name="viewport" content="width=' + designWidth + ',minimum-scale=' + phoneScale + ',maximum-scale=' + phoneScale + ', target-densitydpi=device-dpi">');
		} else {
			document.write('<meta name="viewport" content="width=' + designWidth + ',target-densitydpi=device-dpi">');
		}
	} else {
		document.write('<meta name="viewport" content="width=' + designWidth + ',user-scalable=no,target-densitydpi=device-dpi,minimal-ui,viewport-fit=cover">');
	}
}(640);