API Reference

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API Reference / @dasch-ng/web-utils / fileTypeOf

Function: fileTypeOf()

fileTypeOf(file): FileType | null

Defined in: file-type.ts:25

Classifies a file by the extension of its name (or a File), e.g. to pick an icon. Returns null for unknown extensions. The extension says nothing about the content; do not use it as a security check.

Parameters

file

string | { name: string; } | null | undefined

Returns

FileType | null

Example

fileTypeOf('Interview_Take3.MOV'); // 'video'
fileTypeOf(input.files[0]);        // 'image'
fileTypeOf('notes');               // null