fix: 修复 el-popover 等弹出层事件问题

src/utils/util.js

@@ -240,15 +240,53 @@ export function objToArray(obj) {
   return isEmpty(obj) ? [] : [obj];
 }
 
+/**
+ * 新的兼容获取 event.path 方法
+ * https://stackoverflow.com/questions/39245488/event-path-is-undefined-running-in-firefox
+ * @param evt
+ * @returns {Window[]|*|*[]}
+ */
+export function eventPath(evt) {
+  let path = (evt.composedPath && evt.composedPath()) || evt.path;
+  let target = evt.target;
+
+  if (path != null) {
+    // Safari doesn't include Window, but it should.
+    return (path.indexOf(window) < 0) ? path.concat(window) : path;
+  }
+
+  if (target === window) {
+    return [window];
+  }
+
+  function getParents(node, memo) {
+    memo = memo || [];
+    let parentNode = node.parentNode;
+
+    if (!parentNode) {
+      return memo;
+    } else {
+      return getParents(parentNode, memo.concat(parentNode));
+    }
+  }
+
+  return [target].concat(getParents(target), window);
+}
+
+/**
+ * 用于修复 el-popover el-select 等弹出层事件
+ * @param e
+ * @returns {*}
+ */
 export function calcShadowRootEvent(e) {
   if (!e) return;
   let event = e.target;
   if (e.target.shadowRoot && e.target.shadowRoot.toString() === '[object ShadowRoot]') {
-    let eventPath = e.composedPath();
-    if (!eventPath.length) {
-      eventPath = e.path;
+    let eventPaths = eventPath(e);
+    if (eventPaths.length > 1) {
+      event = eventPaths[1];
     }
-    event = eventPath[0];
+    event = eventPaths[0];
   }
   return event;
 }