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Does anyone know how to TypeScript? :joy:

`rrdatas: [computeInstance.networkInterfaces[0].accessConfigs[0]?.natIp]`

I can't seem to get this to work. accessConfigs is an optional, so could be empty

TS doesn’t yet have null safe calls. You have to check if it’s defined first I believe.

<https://github.com/pulumi/examples/blob/b7bde24530d438c857b777224cea13ab701e5602/gcp-js-webserver/index.js#L38>

Is there something special about the export on its own then?

Are you getting an actual error, or is your IDE warning you?

I guess I can ignore that and run it ? :stuck_out_tongue:

You could add a check above that line to see if `accessConfigs` is `undefined` by doing something like this:

```
if (!computeInstance.networkInterfaces[0].accessConfigs) {
  // Do something when it doesn't have a value. Maybe throw an error?
}
```

That should get rid of the IDE warning that it could be `undefined`. The other thing you could do is use the assertion operation `!` like this: `computeInstance.networkInterfaces[0].accessConfigs[0]!.natIp`, but this is not really recommended unless you know for sure that it cannot be undefined/null ever.