[ ] bug report
[x] feature request
[ ] support request

Did anyone wrote a component to hide navbar on scroll and slide up the tabs while its hidden and show up as soon scroll starts opposite direction?
Similarly, same we can do with fab menu's.

Ionic version: (check one with "x")
[ ] 2.x
[ ] 3.x
[x] 4.x

Ion2-calendar mode: (check one with "x")
[x] components mode
[ ] modal mode

I'm submitting a ... (check one with "x")
[x] bug report
[] feature request
[ ] help me

Current behavior:
when I select a date range between the end of one month and the beginning of another, the selection bar is br

My project in angular universal has error：

My development environment：

node v7.5.0
npm 4.1.2

package.json：

"@angular/animations": "^4.2.4",
"@angular/common": "^4.2.4",
"@angular/compiler": "^4.2.4",
"@angular/core": "^4.2.4",
"@angular/forms": "^4.2.4

there is no example in how or where to put the enviroment variable irself, i must put inside the env object or outside? it must have export const if is outside? and then how i used in the code, it just say how to import it. maybe this is too obvios to most people or i don't read someting in the documentation to understand it but i think it must be self explanatory.