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Current behavior
As I see it this supports Material CSS
Expected behavior
Does it support Bootstrap CSS?
Reproduction of the problem
no problem..
What is the motivation / use case for changing the behavior?
You indicate that you:
Decoupled theme'ing with included Google Material theme
Please tell us about your environment:
Angular4 CLI using Bootstrap4 and nb-bootstrap
Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web
Chrome
Language: [all | TypeScript X.X | ES6/7 | ES5]
TypeScript 2.4
No but you can easily style it that way with a custom theme.
Anyone have a theme they would like to share?
I have seen in change log there is a bootstrap theme included now, I have added bootstrap css file and applied class="bootstrap" on the table. It styles like this:

Not sure if this is correct.
Any news about this? I see the same problem.
I ended up using _PrimeFaces_ PrimeNg library. It uses a BootStrap 2 like CSS and has 17 pre-built themes. PrimeNg's grid is quite good, and I can't remember a problem. But, the PrimeNg dialog (window popup) has an annoying render/display timing issue. I will need to redesign that code.
Most helpful comment
Anyone have a theme they would like to share?