jquery项目移动端适配

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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
<script src="./js/plugins/flexible/index.js"></script>

index.js 文件
(function flexible(window, document) {
  var docEl = document.documentElement
  var dpr = window.devicePixelRatio || 1

  // adjust body font size
  function setBodyFontSize() {
    if (document.body) {
      document.body.style.fontSize = (12 * dpr) + 'px'
    } else {
      document.addEventListener('DOMContentLoaded', setBodyFontSize)
    }
  }
  setBodyFontSize();

  // set 1rem = viewWidth / 10
  function setRemUnit() {
    var rem = docEl.clientWidth / 10
    docEl.style.fontSize = rem + 'px'
  }

  setRemUnit()

  // reset rem unit on page resize
  window.addEventListener('resize', setRemUnit)
  window.addEventListener('pageshow', function (e) {
    if (e.persisted) {
      setRemUnit()
    }
  })

  // detect 0.5px supports
  if (dpr >= 2) {
    var fakeBody = document.createElement('body')
    var testElement = document.createElement('div')
    testElement.style.border = '.5px solid transparent'
    fakeBody.appendChild(testElement)
    docEl.appendChild(fakeBody)
    if (testElement.offsetHeight === 1) {
      docEl.classList.add('hairlines')
    }
    docEl.removeChild(fakeBody)
  }
}(window, document))

正常情况下750设计稿量多少写多少*@px2rem
在less中定义一个变量
@px2rem : 1/75rem;
然后量出的尺寸比如宽 100px;那么我们写成 width:100*@px2rem;即可
clac写法 height: calc(~“100% - 50*@{px2rem}”);