react typescript usestate array

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Maria José
29 Jun 2020
1const [devices, setDevices] = useState<string[]>([])
source
Janis
07 Nov 2019
1
2interface PersonProps {
3  name: string;
4  age: number;
5  hobbies: Array<string>;
6  isCool: boolean;
7}
8
9// Boolean type
10const [isCool] = React.useState<boolean>(true);
11
12// String type
13const [name] = React.useState<string>('Ruben');
14
15// Number type
16const [age] = React.useState<number>(28);
17
18// Null or undefined
19const [random] = React.useState<null | undefined>();
20
21// Array of string 
22const [hobbies] = React.useState<Array<string>>(['soccer', 'cooking', 'code']);
23
24// Custom interface
25const [person] = React.useState<PersonProps>({
26  isCool,
27  name,
28  age,
29  hobbies
30});
31
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