1. install dependencies
npm i lib-flexible -S npm i px2rem-loader -D
2. create a new folder in the src utils folder, the new folder utils flexible.js in which code is as follows
(function() {
// flexible.css
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 = document.createElement('style');
document.getElementsByTagName('head')[0].appendChild(styleEl);
if (styleEl.styleSheet) {
if (!styleEl.styleSheet.disabled) {
styleEl.styleSheet.cssText = cssText;
}
} else {
try {
styleEl.innerHTML = cssText;
} catch (e) {
styleEl.innerText = cssText;
}
}
})();
;
(function(win, lib) {
var doc = win.document;
var docEl = doc.documentElement;
var metaEl = doc.querySelector('meta[name="viewport"]');
doc.querySelector flexibleEl = var ( 'Meta [name = "flexible"]');
var DPR = 0;
var Scale = 0;
var TID;
var flexible lib.flexible = || (lib.flexible = {});
IF (METAEL) {
console.warn ( 'will be set in accordance with the existing scaling meta tags');
var match = metaEl.getAttribute ( 'Content') match (/ Initial \ -scale = (. [\ D \.] +) /);
IF (match) {
Scale = parseFloat (match [. 1]);
DPR = the parseInt (. 1 / Scale);
}
} the else IF (flexibleEl) {
var flexibleEl.getAttribute Content = ( 'Content');
IF (Content) {
var initialDpr content.match = (/ Initial \ -dpR = ([\ D \.] +) /);
var maximumDpr content.match = (/ 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));
}
}
}
(!! && Scale DPR) IF {
var isAndroid win.navigator.appVersion.match = (/ Android / GI );
var isIPhone win.navigator.appVersion.match = (/ iPhone / GI);
var = devicePixelRatio win.devicePixelRatio;
IF (isIPhone) {
// at the iOS, 2 and 3 for the screen, with 2 solutions, the remaining 1 by scheme times
IF (devicePixelRatio> =. 3 && (DPR DPR ||> =. 3)!) {
IF ( docEl.firstElementChild) {
dpr = 3;
} else if (devicePixelRatio >= 2 && (!dpr || dpr >= 2)) {
2 = DPR;
} the else {
DPR = 1;
}
} the else {
// other devices, still using 1x embodiment
DPR = 1;
}
Scale = 1 / DPR;
}
docEl.setAttribute ( 'Data-DPR', DPR );
! IF (METAEL) {
METAEL = doc.createElement ( 'Meta');
metaEl.setAttribute ( 'name', 'the viewport');
metaEl.setAttribute ( 'Content', 'Initial-Scale =' + + Scale ' , maximum-Scale = '+ + Scale', Minimum-Scale = '+ + Scale', User-Scalable = NO ');
docEl.firstElementChild.appendChild (METAEL);
} else {
var wrap = doc.createElement('div');
wrap.appendChild(metaEl);
doc.write(wrap.innerHTML);
}
}
function refreshRem() {
var width = docEl.getBoundingClientRect().width;
if (width / dpr > 540) {
width = width * dpr;
}
var rem = width / 10;
docEl.style.fontSize = rem + 'px';
flexible.rem = win.rem = rem;
}
win.addEventListener('resize', function() {
clearTimeout(tid);
tid = setTimeout(refreshRem, 300);
}, false);
win.addEventListener('pageshow', function(e) {
if (e.persisted) {
clearTimeout(tid);
tid = setTimeout(refreshRem, 300);
}
}, false);
if (doc.readyState === 'complete') {
doc.body.style.fontSize = 12 * dpr + 'px';
} else {
doc.addEventListener('DOMContentLoaded', function(e) {
doc.body.style.fontSize = 12 * dpr + 'px';
}, false);
}
refreshRem();
flexible.dpr = win.dpr = dpr;
flexible.refreshRem = refreshRem;
flexible.rem2px = function(d) {
var val = parseFloat(d) * this.rem;
if (typeof d === 'string' && d.match(/rem$/)) {
val += 'px';
}
return val;
}
flexible.px2rem = function(d) {
var val = parseFloat(d) / this.rem;
if (typeof d === 'string' && d.match(/px$/)) {
val += 'rem';
}
return val;
}
})(window, window['lib'] || (window['lib'] = {}));
3. flexible.js introduced in the main.js
import './utils/flexible.js'
4. Modify in the build utils.js
const px2remLoader = {
loader: 'px2rem-loader',
options: {
remUnit: 192
}
}
const loaders = options.usePostCSS ? [cssLoader, postcssLoader, px2remLoader] : [cssLoader, px2remLoader]
5. Start project
reference: