use-init-ref v0.1.1

Description

You can call this:

const myRef = useInitRef(()=>new Matrix4())

Instead of:

const myRef = useRef(new Matrix4())

Or this - has problems with typescript and is convoluted:

const myRef = useRef<?>(null)
if(myRef.current===null){
  myRef.current = new Matrix4()
}

Or this - requires destructuring and doesnt actually return a ref:

const [myMatrix] = useState(()=>new Matrix4())

// later, you are unable to change the contents
// ? = new Vector4()

useInitRef allows you to pass the initializer function like you would in useState but you get MutableRefObject<T> as you would with normal useRef.

If used on primitives eg foo or 5, best to just use the normal useRef.