React Router - how to constrain params in route matching?

Question

I don\'t really get how to constrain params with, for example a regex.
How to differentiate these two routes?

Answer 1

I'm not sure if this is possible with React router at the moment. However there's a simple solution to your problem. Just do the int/alpha check in another component, like this:

    


const Child0 = (props) => {
    let n = props.params.index;
    if (!isNumeric(n)) {
        return ;
    } else {
        return ;
    }
}

* Note that the code above does not run, it's just there to show what I mean.