Please see ars technica article for a description about the principles of UTIs.

For a list of known UTIs please see here

import { UTIController } from "uti";

const uc = new UTIController();
const doesConformTo = uc.conformsTo("public.image", "public.data");
console.log("doesConformTo: " + doesConformTo);

console.log(uc.getUTIsForFileName("a.txt")[0]);

Output

doesConformTo: true
public.plain-text

• UTI
  • Parameters
  • Properties
  • conformsTo
    • Parameters
  • toJSON
• UTIController
  • Properties
  • utiByMimeType
  • utiByFileNameExtension
  • register
    • Parameters
  • getUTI
    • Parameters
  • getUTIsForMimeType
    • Parameters
  • getUTIsForFileName
    • Parameters
  • conformsTo
    • Parameters
  • fileNameConformsTo
    • Parameters

Object representing a UTI.

• name string
• conforms Set<UTI>

• name string
• conforms Set<UTI>

Check for conformity.

• other UTI

Returns boolean true if other conforms to the receiver

Deliver JSON representation of the UTI. Sample result

{
  "name": "myUTI",
  "conformsTo": [ "uti1", "uti2"]
}

Returns Object json representation of the UTI

Registry of UTIs.

• registry Map<string, UTI>
• utiByMimeType Map<string, UTI>
• utiByFileNameExtension Map<string, UTI>

Type: Map<string, Array<string>>

Type: Map<string, Array<string>>

Registers additional types.

• types Array<Object>

Lookup a given UTI.

• name string UTI

Returns (string | undefined) UTI for the given name or undefined if UTI is not present.

Lookup a UTIs for a mime type.

• mimeType string mime type to get UTIs for

Returns Array<string> UTIs for the given mime type

Lookup a UTI for a file name. First the file name extension is extracted. Then a lookup in the reistered UTIs for file name extions is executed.

• fileName string file to detect UTI for

Returns Array<string> UTIs for the given fileName

Check whenever two UTI are conformant. If a conforms to b and b conforms to c then a also conforms to c.

• a string first UTI
• b string second UTI

Returns boolean true if UTI a conforms to UTI b.

Lookup a UTI for a file name and check conformance.

• fileName string file to detect UTI for
• uti string to check conformance against

Returns boolean ture if utils for file name are conformant

With npm do:

npm install uti

BSD-2-Clause