adding border in react native

1button: {  
2	borderWidth: 4,
3    borderColor: "#20232a",
4}

1borderColor string
2borderTopColor string
3borderRightColor string
4borderBottomColor string
5borderLeftColor string
6borderRadius number
7borderTopLeftRadius number
8borderTopRightRadius number
9borderBottomLeftRadius number
10borderBottomRightRadius number
11borderStyle enum('solid', 'dotted', 'dashed')
12borderWidth number
13borderTopWidth number
14borderRightWidth number
15borderBottomWidth number
16borderLeftWidth number