How to add prop types to a class component?

howToProp.md

Let's say we have a class component named, Trees.

We can import proptypes as such. import PropTypes from "prop-types"

Way 1

Outside of component itself. Best for Functional Components.

Trees.propTypes = {
  getTrees: PropTypes.func.isRequired,
  treeItems: PropTypes.object
}

Way 2

Inside of component using, static.

static propTypes = {
  getTrees: PropTypes.func.isRequired,
  treeItems: PropTypes.object
}