vue pc端分辨率自适应

1.项目初始化完成后，在项目目录中安装 lib-flexible 和 px2rem-loader。

1. npm install lib-flexible --save-dev

2. npm i postcss-px2rem --save

2.创建vue.config.js 添加如下：

module.exports = {

    lintOnSave: false,

    configureWebpack: {},

    chainWebpack: () => {},

    css: {

      loaderOptions: {

        css: {},

        postcss: {

          plugins: [

            require("postcss-px2rem")({

              remUnit: 192  //设计稿的分辨率/10

            })

          ]

        }

      }

    }

  };

3.在src下边创建utils文件夹并创建flexible.js 添加如下：

(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"]');

    var flexibleEl = doc.querySelector('meta[name="flexible"]');

    var dpr = 0;

    var scale = 0;

    var tid;

    var flexible = lib.flexible || (lib.flexible = {});

    if (metaEl) {

        console.warn('将根据已有的meta标签来设置缩放比例');

        var match = metaEl.getAttribute('content').match(/initial\-scale=([\d\.]+)/);

        if (match) {

            scale = parseFloat(match[1]);

            dpr = parseInt(1 / scale);

        }

    } else if (flexibleEl) {

        var content = flexibleEl.getAttribute('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));

            }

        }

    }

    if (!dpr && !scale) {

        var isAndroid = win.navigator.appVersion.match(/android/gi);

        var isIPhone = win.navigator.appVersion.match(/iphone/gi);

        var devicePixelRatio = win.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;

    }

    docEl.setAttribute('data-dpr', dpr);

    if (!metaEl) {

        metaEl = doc.createElement('meta');

        metaEl.setAttribute('name', 'viewport');

        metaEl.setAttribute('content', 'initial-scale=' + scale + ', maximum-scale=' + scale + ', minimum-scale=' + scale + ', user-scalable=no');

        if (docEl.firstElementChild) {

            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'] = {}));

4.main.js 添加：

import ‘./utils/flexible’
最后重启即可

出自于： https://www.jianshu.com/p/1dd3be8eeb90