3.x when i set #app margin , will be appears blank
Oct 17th 2020
Version
3.0.1
Reproduction link
https://codesandbox.io/s/lingering-water-iou1k?file=/src/App.vue
https://user-images.githubusercontent.com/28197668/96351563-c5b27580-10ee-11eb-8a8c-4e4280ff3ca2.png
https://user-images.githubusercontent.com/28197668/96351587-f85c6e00-10ee-11eb-8589-0e437cdb4bf0.png
Steps to reproduce
change margin
What is expected?
not blank
What is actually happening?
appears blank
Oct 17th 2020
This is because Vue 3 no longer replaces thes #app element but appends inside of it