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Answer

how to create a parent chiled dropdown in angular 2?

Sujeet Raman

Sujeet Raman
5y
538
1
i have a plane drop down with checkbox,like
 
(this is my app
 
  1. https://stackblitz.com/edit/angular-xem199  
 ) 
 
A[]
B[]
C[]
D[]
 
Now i want to change my dropdown as 
 
A[]
a[]
b[]
c[] 
 
B[]
a[]
b[]
c[] 
 
 
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