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node_modules/amfe-flexible/index.js

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+(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))