Cannot read property ‘params’ of undefined (React Router 4)

Question

I have a route set up to render a component:

Answer 1

Because with render you are not passing the default props passed by the router into component, like match, history etc.

When you write this:

It means no props value in PageStart component.

Write it like this:

render = {props =>  } />

Now {...props} will pass all the value into PageStart component.