fix(space): is shown when it has no children, closes #1605

CHANGELOG.en-US.md

@@ -18,6 +18,7 @@
 ### Fixes
 
 - Fix the default value of the `suffix` internal component's `loading` property.
+- Fix `n-space` is shown when it has no children, closes [#1605](https://github.com/TuSimple/naive-ui/issues/1605).
 
 ## 2.20.3 (2021-11-15)
 

CHANGELOG.zh-CN.md

@@ -18,6 +18,7 @@
 ### Fixes
 
 - 修复 `suffix` 内部组件 `loading` 属性的默认值
+- 修复 `n-space` 没有子节点的时候还被展示，关闭 [#1605](https://github.com/TuSimple/naive-ui/issues/1605).
 
 ## 2.20.3 (2021-11-15)
 

src/space/src/Space.tsx

@@ -98,6 +98,7 @@ export default defineComponent({
       mergedClsPrefix
     } = this
     const children = flatten(getSlot(this))
+    if (!children.length) return null
     const horizontalMargin = `${margin.horizontal}px`
     const semiHorizontalMargin = `${margin.horizontal / 2}px`
     const verticalMargin = `${margin.vertical}px`