I'm currently null checking an object structure like so:

if (error.response && error.response.data && error.response.data.errorMessage)
{
  // Do stuff
}

All I really want to do is null check the deepest variable error.response.data.errorMessage, but because I want to avoid null pointer exceptions in the check I have to first check error.response, and then error.response.data.

Is there a cleaner way to do this? I imagine as you want to query deeper and deeper into the hierarchy it can get quite messy.

Thanks in advance!

CodePudding user response：

You can use optional chaining:

if (error.response?.data?.errorMessage) {
  // Do stuff
}