Check history previous location before goBack() react router v4

Question

My goal is to enable a \"Go Back\" button, but only if the route/path the user would go back to is in a certain category.

More precisely I have two kinds of Routes

Answer 1

While navigating though the Link component or even though history.push, you could pass the current location to another Route component

like

<Link to={{pathname: '/graph/1', state: { from: this.props.location.pathname }}} />

or

history.push({
  pathname: '/graph/1',
  state: { 
      from: this.props.location.pathname
  }
})

and then you could just get this location in your Component like this.props.location.state && this.props.location.state.from and then decide whether you wan't to goBack or not

Answer 2

The history object has entries and the current index. I used these in the following way:

var lastLocation = history.entries[history.index - 1];
var lastUrl = lastLocation.pathname;