fix(OverlayTrigger): 修复嵌套弹出导致元素层级异常 (#960)

* fix: 修复table展示问题

* fix: 修复table宽度

* fix(DatePicker): 修复日历年份选择异常

* chore(deps): update dependency lerna to v6.0.0

* fix(OverlayTrigger): 修复嵌套弹出导致元素层级异常

* remove other class

Author: yaob421123

packages/react-overlay-trigger/src/index.tsx

@@ -251,13 +251,22 @@ export default React.forwardRef<OverlayTriggerRef, OverlayTriggerProps>((props,
 
   function hide() {
     if (!isOpen) return;
-    zIndex.current -= 1;
+    if (zIndex.current <= 999) {
+      zIndex.current = 999;
+    } else {
+      zIndex.current -= 1;
+    }
     setIsOpen(false);
   }
 
   function show() {
     if (isOpen) return;
-    zIndex.current += 1;
+    const nodeIndex = triggerRef.current?.style.zIndex;
+    if (nodeIndex) {
+      zIndex.current = Number(nodeIndex) + 1;
+    } else {
+      zIndex.current += 1;
+    }
     setIsOpen(true);
   }
 
@@ -305,6 +314,7 @@ export default React.forwardRef<OverlayTriggerRef, OverlayTriggerProps>((props,
         Object.assign({}, child.props, {
           ...triggerProps,
           ref: triggerRef,
+          style: { zIndex: zIndex.current },
           className: [child.props.className, disabled ? `${prefixCls}-disabled` : null]
             .filter(Boolean)
             .join(' ')

website/src/layouts/index.module.less

@@ -22,6 +22,8 @@
 }
 
 .layoutWrap {
+  position: relative;
+  z-index: 1;
   background-color: #fff;
   min-height: calc(100vh - 53px);
 }