关于移动端适配方案

写在前面：

转自：https://blog.csdn.net/weixin_43686133/article/details/110535069

JS部分：

第一种：

/**
 * 设置根元素font-size
 * 当设备宽度为375(iPhone6)时，1rem=100px
 * 除以100并将px换成rem
 */
(function (doc, win) {
  var docEl = doc.documentElement,
    resizeEvt = "orientationchange" in window ? "orientationchange" : "resize",
    recalc = function () {
      var clientWidth = docEl.clientWidth;
      if (!clientWidth) return;
      if (clientWidth >= 375) {
        docEl.style.fontSize = "100px";
      } else {
        docEl.style.fontSize = 100 * (clientWidth / 375) + "px";
      }
    };

  if (!doc.addEventListener) return;
  win.addEventListener(resizeEvt, recalc, false);
  doc.addEventListener("DOMContentLoaded", recalc, false);
})(document, window);

 

第二种：

/**
 * 设置根元素font-size
 * 当设备宽度为375(iPhone6)时，1rem=100px
 * 除以100并将px换成rem
 */
(function (doc, win) {
  var docEl = win.document.documentElement;
  var resizeEvt =
    "orientationchange" in window ? "orientationchange" : "resize";

  var refreshRem = function () {
    var clientWidth =
      win.innerWidth || doc.documentElement.clientWidth || doc.body.clientWidth;

    console.log(clientWidth);
    if (!clientWidth) return;
    var fz;
    var width = clientWidth;
    fz = (100 * width) / 375;
    docEl.style.fontSize = fz + "px";
  };

  if (!doc.addEventListener) return;
  win.addEventListener(resizeEvt, refreshRem, false);
  doc.addEventListener("DOMContentLoaded", refreshRem, false);
  refreshRem();
})(document, window);

 

第三种：

/**
 * 设置根元素font-size
 * 当设备宽度为375(iPhone6)时，1rem=100px
 * 除以100并将px换成rem
 */
(function (doc, win) {
  var docEl = doc.documentElement,
    isIOS = navigator.userAgent.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/),
    dpr = isIOS ? Math.min(win.devicePixelRatio, 3) : 1,
    dpr = window.top === window.self ? dpr : 1, //被iframe引用时，禁止缩放
    dpr = 1,
    scale = 1 / dpr,
    resizeEvt = "orientationchange" in window ? "orientationchange" : "resize";
  docEl.dataset.dpr = dpr;
  var metaEl = doc.createElement("meta");
  metaEl.name = "viewport";
  metaEl.content =
    "initial-scale=" +
    scale +
    ",maximum-scale=" +
    scale +
    ", minimum-scale=" +
    scale;
  docEl.firstElementChild.appendChild(metaEl);
  var recalc = function () {
    var width = docEl.clientWidth;
    if (width / dpr > 750) {
      width = 750 * dpr;
    }
    // 乘以100，px : rem = 100 : 1
    docEl.style.fontSize = 100 * (width / 375) + "px";
  };
  recalc();
  if (!doc.addEventListener) return;
  win.addEventListener(resizeEvt, recalc, false);
})(document, window);

 

CSS部分：

/* http://meyerweb.com/eric/tools/css/reset/ 
v2.0 | 20110126
License: none (public domain)
*/

html,
body,
div,
span,
applet,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
strong,
sub,
sup,
tt,
var,
b,
u,
i,
center,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
embed,
figure,
figcaption,
footer,
header,
hgroup,
menu,
nav,
output,
ruby,
section,
summary,
time,
mark,
audio,
video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}

/* HTML5 display-role reset for older browsers */
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
  display: block;
}

body {
  line-height: 1;
}

ol,
ul {
  list-style: none;
}

blockquote,
q {
  quotes: none;
}

blockquote:before,
blockquote:after,
q:before,
q:after {
  content: "";
  content: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

 

HTML部分：

<meta name="viewport" content="width=device-width,height=device-height,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">