Q: How to execute code client-side only

I have a callback route in my application that receives access token from auth process in URL hash fragment. I’d like to parse it and save into redux store. I used to get it through window.location.hash before I switched to next, but this is not available when page renders server-side (also the hash fragment apparently isn’t sent to server, so I can’t parse it there).

Is there any way to restrict some code to execute only in client-side? Or is there any other way to achieve this?

[zenflow]

@vanniewelt You can always look at process.browser…

if (process.browser) {
  // client-side-only code
}

edit by @Timer:

@vanniewelt You can always look at typeof window…

if (typeof window !== 'undefined') {
  // client-side-only code
}

[timneutkens]

You can also use the componentDidMount lifecycle method of React. It’s not called server side.