Function attemptResolveArray

core/parcel-resolver-post/src/handle-ts-path.ts:162–193

Attempt to resolve any path associated with the alias to a file or directory index

(
  from: string,
  alias: string,
  realPaths: TsPaths,
  parentFile: string
)

// TODO support resource loaders like 'url:@alias/my.svg'
/** Attempt to resolve any path associated with the alias to a file or directory index */
function attemptResolveArray(
  from: string,
  alias: string,
  realPaths: TsPaths,
  parentFile: string
) {
  for (const option of realPaths) {
    const absoluteBaseFile = resolve(
      from.replace(trimStar(alias), trimStar(option))
    )

    const importExt = extname(absoluteBaseFile)

    if (importExt.length > 0 && relevantExtSet.has(importExt as any)) {
      return absoluteBaseFile
    }

    const parentExt = extname(parentFile)

    const checkingExts = [
      parentExt,
      ...relevantExtList.filter((ext) => ext !== parentExt)
    ]

    const mod = findModule(absoluteBaseFile, checkingExts)

    if (mod !== null) {
      return mod
    }
  }
  return null
}

type TSConfig = { compilerOptions: CompilerOptions; filePath: string }