init

src/utils/browser.js

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+// 判断是否IE<11浏览器
+export function isIE () {
+  return navigator.userAgent.indexOf('compatible') > -1 && navigator.userAgent.indexOf('MSIE') > -1
+}
+
+export function isIE11 () {
+  return navigator.userAgent.indexOf('Trident') > -1 && navigator.userAgent.indexOf('rv:11.0') > -1
+}
+
+// 判断是否IE的Edge浏览器
+export function isEdge () {
+  return navigator.userAgent.indexOf('Edge') > -1 && !isIE()
+}
+
+export function getIEVersion () {
+  const userAgent = navigator.userAgent // 取得浏览器的userAgent字符串
+  const isIEFlag = isIE()
+  const isIE11Flag = isIE11()
+  const isEdgeFlag = isEdge()
+
+  if (isIEFlag) {
+    const reIE = new RegExp('MSIE (\\d+\\.\\d+);')
+    reIE.test(userAgent)
+    const fIEVersion = parseFloat(RegExp.$1)
+    if (fIEVersion === 7 || fIEVersion === 8 || fIEVersion === 9 || fIEVersion === 10) {
+      return fIEVersion
+    } else {
+      return 6// IE版本<7
+    }
+  } else if (isEdgeFlag) {
+    return 'edge'
+  } else if (isIE11Flag) {
+    return 11
+  } else {
+    return -1
+  }
+}