Funloading

[comp:Popover ] 如果父节点在Popover之前消失，popover会到页面左上角

2

- [x] I have searched the [issues](https://github.com/IDuxFE/idux/issues) of this repository and believe that this is not a duplicate. ### Reproduction link [复现代码](https://playground.idux.site/#eyJQbGF5Z3JvdW5kQXBwLnZ1ZSI6Ijx0ZW1wbGF0ZT5cbiAgPEl4RHJhd2VyUHJvdmlkZXI+XG4gICAgPEl4Tm90aWZpY2F0aW9uUHJvdmlkZXI+XG4gICAgICA8SXhNb2RhbFByb3ZpZGVyPlxuICAgICAgICA8SXhNZXNzYWdlUHJvdmlkZXI+XG4gICAgICAgICAgPEFwcCAvPlxuICAgICAgICA8L0l4TWVzc2FnZVByb3ZpZGVyPlxuICAgICAgPC9JeE1vZGFsUHJvdmlkZXI+XG4gICAgPC9JeE5vdGlmaWNhdGlvblByb3ZpZGVyPlxuICA8L0l4RHJhd2VyUHJvdmlkZXI+XG48L3RlbXBsYXRlPlxuXG48c2NyaXB0IGxhbmc9XCJ0c1wiIHNldHVwPlxuaW1wb3J0IHsgc2V0dXBJZHV4IH0gZnJvbSAnLi9zZXR1cElkdXguanMnXG5pbXBvcnQgQXBwIGZyb20gJy4vQXBwLnZ1ZSdcbnNldHVwSWR1eCgpXG48L3NjcmlwdD5cbiIsIkFwcC52dWUiOiI8dGVtcGxhdGU+XG4gICAgPGRpdiBAY2xpY2s9XCJtZW51VmlzaWJsZSA9ICFtZW51VmlzaWJsZVwiPlxuICAgICAgICDmiZPlvIAv5YWz6Zet6I+c5Y2VXG4gICAgPC9kaXY+XG4gICAgPGRpdiB2LXNob3c9XCJtZW51VmlzaWJsZVwiIGNsYXNzPVwibWVudV9saXN0XCI+XG4gICAgICAgIDxJeFBvcG92ZXIgcGxhY2VtZW50PVwicmlnaHRTdGFydFwiIHRyaWdnZXI9XCJob3ZlclwiIGNsYXNzPVwiY3VzdG9tX2xheW91dFwiPlxuICAgICAgICAgICAgPGRpdj5cbiAgICAgICAgICAgICAgICA8cD7ov5nmmK/kuIDkuKroj5zljZXpgInpobk8L3A+XG4gICAgICAgICAgICAgICAgPEl4SWNvbiBjbGFzcz1cInNob3J0Y3V0c1wiIG5hbWU9XCJyaWdodFwiIC8+XG4gICAgICAgICAgICA8L2Rpdj5cbiAgICAgICAgICAgIDx0ZW1wbGF0ZSAjY29udGVudD5cbiAgICAgICAgICAgICAgICA8ZGl2XG4gICAgICAgICAgICAgICAgICAgIHYtZm9yPVwiY29tcG9uZW50IGluIGNvbXBvbmVudExpc3RcIlxuICAgICAgICAgICAgICAgICAgICA6a2V5PVwiY29tcG9uZW50XCJcbiAgICAgICAgICAgICAgICAgICAgY2xhc3M9XCJjb21wb25lbnQtbGlzdFwiXG4gICAgICAgICAgICAgICAgICAgIEBjbGljaz1cImNoYW5nVHlwZShjb21wb25lbnQpXCI+XG4gICAgICAgICAgICAgICAgICAgIDxwPnt7IGNvbXBvbmVudCB9fTwvcD5cbiAgICAgICAgICAgICAgICA8L2Rpdj5cbiAgICAgICAgICAgIDwvdGVtcGxhdGU+XG4gICAgICAgIDwvSXhQb3BvdmVyPlxuICAgIDwvZGl2PlxuPC90ZW1wbGF0ZT5cblxuPHNjcmlwdCBsYW5nPVwidHNcIiBzZXR1cD5cbmltcG9ydCB7IHJlZiB9IGZyb20gJ3Z1ZSc7XG5cbmNvbnN0IGNvbXBvbmVudExpc3QgPSBbJ2EnLCAnYicsICdjJywgJ2QnLCAnZSddO1xuY29uc3QgbWVudVZpc2libGUgPSByZWYoZmFsc2UpO1xuXG5jb25zdCBjaGFuZ1R5cGUgPSAoY29tcG9uZW50OiBzdHJpbmcpID0+IHtcbiAgICBtZW51VmlzaWJsZS52YWx1ZSA9IGZhbHNlO1xufTtcbjwvc2NyaXB0PlxuXG48c3R5bGU+XG4ubWVudV9jb250YWluZXIge1xuICAgIG1pbi13aWR0aDogMjAwcHg7XG4gICAgcG9zaXRpb246IGFic29sdXRlO1xufVxuLm1lbnVfbGlzdCB7XG4gICAgbWluLXdpZHRoOiAyMDBweDtcbiAgICBwb3NpdGlvbjogYWJzb2x1dGU7XG4gICAgYmFja2dyb3VuZC1jb2xvcjogaHNsYSgwLDAlLDEwMCUsMSk7XG4gICAgYm9yZGVyLXJhZGl1czogNHB4O1xuICAgIGJveC1zaGFkb3c6IDBweCA1cHggMTBweCByZ2JhKDAsMCwwLDAuMTUpO1xuICAgIGJvcmRlcjogMXB4IHNvbGlkIHJnYmEoMCwwLDAsMC4wNCk7XG4gICAgcGFkZGluZzogOHB4IDE2cHggOHB4IDZweDtcbiAgICBwYWRkaW5nOiA4cHggMDtcbiAgICBmb250LXNpemU6IDEycHg7XG59XG4ubWVudV9saXN0IHAge1xuICAgIHRleHQtYWxpZ246IGxlZnQ7XG4gICAgbWFyZ2luOiAwO1xuICAgIHBhZGRpbmc6IDAgNHB4O1xufVxuLm1lbnVfbGlzdCBwLnNob3J0Y3V0cyB7XG4gICAgYm9yZGVyLXJhZGl1czogMnB4O1xuICAgIGZvbnQtc2l6ZTogMTJweDtcbiAgICBiYWNrZ3JvdW5kOiByZ2JhKDAsMCwwLDAuMDYpO1xufVxuLm1lbnVfbGlzdCBwLm1lbnUtdGl0bGUge1xuICAgIGhlaWdodDogMzJweDtcbiAgICBjb2xvcjogcmdiYSgwLCAwLCAwLCAwLjMzKTtcbn1cblxuLm1lbnVfbGlzdCBkaXYge1xuICAgIGJveC1zaXppbmc6IGJvcmRlci1ib3g7XG4gICAgY3Vyc29yOiBwb2ludGVyO1xuICAgIGRpc3BsYXk6IGZsZXg7XG4gICAganVzdGlmeS1jb250ZW50OiBzcGFjZS1iZXR3ZWVuO1xuICAgIGFsaWduLWl0ZW1zOiBjZW50ZXI7XG4gICAgaGVpZ2h0OiAzMnB4O1xuICAgIGNvbG9yOiByZ2JhKDAsMCwwLDAuNzUpO1xuICAgIHBhZGRpbmctbGVmdDogMThweDtcbiAgICBwYWRkaW5nLXJpZ2h0OiAxNnB4O1xufVxuLm1lbnVfbGlzdCBkaXY6aG92ZXIge1xuICAgIGJhY2tncm91bmQtY29sb3I6ICMzNjYyZWM7XG4gICAgY29sb3I6ICNmZmY7XG59XG4uY3VzdG9tX2xheW91dCB7XG4gICAgd2lkdGg6IDE1NHB4O1xuICAgIG1heC1oZWlnaHQ6IDI1NnB4O1xuICAgIG92ZXJmbG93LXg6IGhpZGRlbjtcbiAgICBvdmVyZmxvdy15OiBhdXRvO1xufVxuLmN1c3RvbV9sYXlvdXQgLml4LXBvcG92ZXItd3JhcHBlciAuaXgtcG9wb3Zlci1jb250ZW50IHtcbiAgICBwYWRkaW5nOiA4cHggMDtcbn1cbi5jb21wb25lbnQtbGlzdCB7XG4gICAgZGlzcGxheTogZmxleDtcbiAgICBhbGlnbi1pdGVtczogY2VudGVyO1xuICAgIHBhZGRpbmctbGVmdDogMThweDtcbiAgICBoZWlnaHQ6IDMycHg7XG4gICAgY3Vyc29yOiBwb2ludGVyO1xufVxuLmNvbXBvbmVudC1saXN0OmhvdmVyIHtcbiAgICBiYWNrZ3JvdW5kLWNvbG9yOiAjMzY2MmVjO1xuICAgIGNvbG9yOiAjZmZmO1xufVxuLmNvbXBvbmVudC1saXN0IHAge1xuICAgIGZvbnQtc2l6ZTogMTJweDtcbiAgICBtYXJnaW46IDA7XG4gICAgcGFkZGluZzogMDtcbn1cbjwvc3R5bGU+In0=) ### Steps to reproduce 1. 点击「打开/关闭菜单」 2. 点击「这是一个菜单选项」...

demo无法访问了

1

demo无法访问了，建议修复一下，毕竟很多人搜索到这个组件的时候第一步是看看demo