📝 Add docs for ConfigProvider getPopupContainer

close #19974

components/config-provider/index.en-US.md

@@ -50,3 +50,23 @@ Some components use dynamic style to support wave effect. You can config `csp` p
 #### Does the locale problem still exist in DatePicker even if ConfigProvider `locale` is used?
 
 Please make sure you set moment locale by `moment.locale('zh-cn')` or that you don't have two different versions of moment.
+
+#### Modal throw error when setting `getPopupContainer`?
+
+Related issue: https://github.com/ant-design/ant-design/issues/19974
+
+When you config `getPopupContainer` to parentNode globally, Modal will throw error of `triggerNode is undefined` because it did not have a triggerNode. You can try the [fix](https://github.com/afc163/feedback-antd/commit/3e4d1ad1bc1a38460dc3bf3c56517f737fe7d44a) below.
+
+```diff
+ <ConfigProvider
+-  getPopupContainer={triggerNode => triggerNode.parentNode}
++  getPopupContainer={node => {
++    if (node) {
++      return node.parentNode;
++    }
++    return document.body;
++  }}
+ >
+   <App />
+ </ConfigProvider>
+```

components/config-provider/index.zh-CN.md

@@ -51,3 +51,23 @@ return (
 #### 为什么我使用了 ConfigProvider `locale`，时间类组件的国际化还有问题？
 
 请检查是否设置了 `moment.locale('zh-cn')`，或者是否有两个版本的 moment 共存。
+
+#### 配置 `getPopupContainer` 导致 Modal 报错？
+
+相关 issue：https://github.com/ant-design/ant-design/issues/19974
+
+当如下全局设置 `getPopupContainer` 为触发节点的 parentNode 时，由于 Modal 的用法不存在 `triggerNode`，这样会导致 `triggerNode is undefined` 的报错，需要增加一个[判断条件](https://github.com/afc163/feedback-antd/commit/3e4d1ad1bc1a38460dc3bf3c56517f737fe7d44a)。
+
+```diff
+ <ConfigProvider
+-  getPopupContainer={triggerNode => triggerNode.parentNode}
++  getPopupContainer={node => {
++    if (node) {
++      return node.parentNode;
++    }
++    return document.body;
++  }}
+ >
+   <App />
+ </ConfigProvider>
+```