1.安装依赖
npm i lib-flexible -S
npm i px2rem-loader -D
2.在src文件夹下新建utils文件夹，在utils文件夹下新建,其代码如下
(function() {
//
var cssText =
'' +
'@charset "utf-8";html{color:#000;background:#fff;overflow-y:scroll;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;-webkit-overflow-scrolling:touch}html *{outline:0;-webkit-text-size-adjust:none;-webkit-tap-highlight-color:transparent}body,html{font-family:"Microsoft YaHei",sans-serif,Tahoma,Arial}article,aside,blockquote,body,button,code,dd,details,div,dl,dt,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,hr,input,legend,li,menu,nav,ol,p,pre,section,td,textarea,th,ul{margin:0;padding:0;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block}input,input[type=button],input[type=reset],input[type=submit]{resize:none;border:none;-webkit-appearance:none;border-radius:0}input,select,textarea{font-size:100%}table{border-collapse:collapse;border-spacing:0}fieldset,img{border:0}abbr,acronym{border:0;font-variant:normal}del{text-decoration:line-through}address,caption,cite,code,dfn,em,th,var{font-style:normal;font-weight:500}ol,ul{list-style:none}caption,th{text-align:left}h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:500}q:after,q:before{content:\'\'}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sup{top:-.5em}sub{bottom:-.25em}a:hover{text-decoration:underline}a,ins{text-decoration:none}a:active,a:hover,a:link,a:visited{background:0 0;-webkit-tap-highlight-color:transparent;-webkit-tap-highlight-color:transparent;outline:0;text-decoration:none}';
// cssText end
var styleEl = ('style');
('head')[0].appendChild(styleEl);
if () {
if (!) {
= cssText;
}
} else {
try {
= cssText;
} catch (e) {
= cssText;
}
}
})();
;
(function(win, lib) {
var doc = ;
var docEl = ;
var metaEl = ('meta[name="viewport"]');
var flexibleEl = ('meta[name="flexible"]');
var dpr = 0;
var scale = 0;
var tid;
var flexible = || ( = {});
if (metaEl) {
('将根据已有的meta标签来设置缩放比例');
var match = ('content').match(/initial\-scale=([\d\.]+)/);
if (match) {
scale = parseFloat(match[1]);
dpr = parseInt(1 / scale);
}
} else if (flexibleEl) {
var content = ('content');
if (content) {
var initialDpr = (/initial\-dpr=([\d\.]+)/);
var maximumDpr = (/maximum\-dpr=([\d\.]+)/);
if (initialDpr) {
dpr = parseFloat(initialDpr[1]);
scale = parseFloat((1 / dpr).toFixed(2));
}
if (maximumDpr) {
dpr = parseFloat(maximumDpr[1]);
scale = parseFloat((1 / dpr).toFixed(2));
}
}
}
if (!dpr && !scale) {
var isAndroid = (/android/gi);
var isIPhone = (/iphone/gi);
var devicePixelRatio = ;
if (isIPhone) {
// iOS下，对于2和3的屏，用2倍的方案，其余的用1倍方案
if (devicePixelRatio >= 3 && (!dpr || dpr >= 3)) {
dpr = 3;
} else if (devicePixelRatio >= 2 && (!dpr || dpr >= 2)) {
dpr = 2;
} else {
dpr = 1;
}
} else {
// 其他设备下，仍旧使用1倍的方案
dpr = 1;
}
scale = 1 / dpr;
}
('data-dpr', dpr);
if (!metaEl) {
metaEl = ('meta');
('name', 'viewport');
('content', 'initial-scale=' + scale + ', maximum-scale=' + scale + ', minimum-scale=' + scale + ', user-scalable=no');
if () {
(metaEl);
} else {
var wrap = ('div');
(metaEl);
();
}
}
function refreshRem() {
var width = ().width;
if (width / dpr > 540) {
width = width * dpr;
}
var rem = width / 10;
= rem + 'px';
= = rem;
}
('resize', function() {
clearTimeout(tid);
tid = setTimeout(refreshRem, 300);
}, false);
('pageshow', function(e) {
if () {
clearTimeout(tid);
tid = setTimeout(refreshRem, 300);
}
}, false);
if ( === 'complete') {
= 12 * dpr + 'px';
} else {
('DOMContentLoaded', function(e) {
= 12 * dpr + 'px';
}, false);
}
refreshRem();
= = dpr;
= refreshRem;
flexible.rem2px = function(d) {
var val = parseFloat(d) * ;
if (typeof d === 'string' && (/rem$/)) {
val += 'px';
}
return val;
}
flexible.px2rem = function(d) {
var val = parseFloat(d) / ;
if (typeof d === 'string' && (/px$/)) {
val += 'rem';
}
return val;
}
})(window, window['lib'] || (window['lib'] = {}));
3.在中引入
import './utils/'
4.修改build下的
const px2remLoader = {
loader: 'px2rem-loader',
options: {
remUnit: 192
}
}
const loaders = ? [cssLoader, postcssLoader, px2remLoader] : [cssLoader, px2remLoader]
5.启动项目
参考：