Repository: supabase/supabase
File: apps/studio/components/interfaces/ProjectCreation/RegionSelector.tsx (TypeScript)

Code before:
  )

  const availableRegions = getAvailableRegions(PROVIDERS[cloudProvider].id)
  const regionsArray = Object.entries(availableRegions).map(([_key, value]) => {
    return {
      code: value.code,
      name: value.displayName,
      provider: cloudProvider,
      status: undefined,
    }
  })

  const regionOptions = smartRegionEnabled ? allRegions : regionsArray
  const isLoading = smartRegionEnabled ? isLoadingAvailableRegions : isLoadingDefaultRegion

  const showNonProdFields =
    process.env.NEXT_PUBLIC_ENVIRONMENT === 'local' ||
    process.env.NEXT_PUBLIC_ENVIRONMENT === 'staging'

  const allSelectableRegions = [...smartRegions, ...regionOptions]
  const selectedRegion =
    field.value !== undefined
      ? allSelectableRegions.find((region) => {
          return !!region.name && region.name === field.value
        })
      : undefined

  if (isErrorAvailableRegions) {
    return <AlertError subject="Error loading available regions" error={errorAvailableRegions} />
  }

  return (
    <FormItemLayout
      layout={layout}
      label="Region"
      description={
        <>
          <p>Select the region closest to your users for the best performance.</p>
          {showNonProdFields && (
            <div className="mt-2 text-warning">
              <p>Only these regions are supported for local/staging projects:</p>
              <ul className="list-disc list-inside mt-1">
                <li>East US (North Virginia)</li>
                <li>Central EU (Frankfurt)</li>
                <li>Southeast Asia (Singapore)</li>
              </ul>
            </div>
          )}
        </>
      }
    >

Review comment (suggestion):
Aren't these type checks a bit overkill? This can be simplifed to:


```suggestion
  const selectedRegion =
allSelectableRegions.find((region) => {
    return !!region.name && region.name === field.value
  })
```

The value is going to get checked to see if its undefined in the renderer right? Tried this on my local and no TS errors

Code after:
  )

  const availableRegions = getAvailableRegions(PROVIDERS[cloudProvider].id)
  const regionsArray = Object.entries(availableRegions).map(([_key, value]) => {
    return {
      code: value.code,
      name: value.displayName,
      provider: cloudProvider,
      status: undefined,
    }
  })

  const regionOptions = smartRegionEnabled ? allRegions : regionsArray
  const isLoading = smartRegionEnabled ? isLoadingAvailableRegions : isLoadingDefaultRegion

  const showNonProdFields =
    process.env.NEXT_PUBLIC_ENVIRONMENT === 'local' ||
    process.env.NEXT_PUBLIC_ENVIRONMENT === 'staging'

  const allSelectableRegions = [...smartRegions, ...regionOptions]
  const selectedRegion = allSelectableRegions.find((region) => {
    return !!region.name && region.name === field.value
  })

  if (isErrorAvailableRegions) {
    return <AlertError subject="Error loading available regions" error={errorAvailableRegions} />
  }

  return (
    <FormItemLayout
      layout={layout}
      label="Region"
      description={
        <>
          <p>Select the region closest to your users for the best performance.</p>
          {showNonProdFields && (
            <div className="mt-2 text-warning">
              <p>Only these regions are supported for local/staging projects:</p>
              <ul className="list-disc list-inside mt-1">
                <li>East US (North Virginia)</li>
                <li>Central EU (Frankfurt)</li>
                <li>Southeast Asia (Singapore)</li>
              </ul>
            </div>
          )}
        </>
      }
    >
      <Select_Shadcn_ value={field.value} onValueChange={field.onChange} disabled={isLoading}>
        <SelectTrigger_Shadcn_ className="[&>:nth-child(1)]:w-full [&>:nth-child(1)]:flex [&>:nth-child(1)]:items-start">
          <SelectValue_Shadcn_