前端和后端源码，合并到一个git仓库中，方便用户下载，避免前后端不匹配的问题

jeecgboot-vue3/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() {
+  let userAgent = navigator.userAgent; //取得浏览器的userAgent字符串
+  let isIE = isIE();
+  let isIE11 = isIE11();
+  let isEdge = isEdge();
+
+  if (isIE) {
+    let reIE = new RegExp('MSIE (\\d+\\.\\d+);');
+    reIE.test(userAgent);
+    let fIEVersion = parseFloat(RegExp['$1']);
+    if (fIEVersion === 7 || fIEVersion === 8 || fIEVersion === 9 || fIEVersion === 10) {
+      return fIEVersion;
+    } else {
+      return 6; //IE版本<7
+    }
+  } else if (isEdge) {
+    return 'edge';
+  } else if (isIE11) {
+    return 11;
+  } else {
+    return -1;
+  }
+}