# react typescript

* props
- we need to declare type for props

    type GreetProps={
        name:string,
        age:number,
        logged:boolean,
        fullName:{
            first:string,
            lase:string
        }
    }
    const Greet = (props: GreetProps)

- auto complete for object props
- if we try to pass different type to props will refuse to pass any wrong type to the props
- types when building applications and interfaces when build libraries
- we have to pass props that declared on type object