How to detect file type in JavaScript without checking its file object type?

• file-type

  5 3,464 7.1 JavaScript

  Detect the file type of a Buffer/Uint8Array/ArrayBuffer

I want instead focus on the file-type library. This library applies the magic numbers approach to the ArrayBuffer of the file for detecting its type. It works with a large amount of different file types.

• is-svg

  1 127 2.6 JavaScript

  Check if a string or buffer is SVG

Unfortunately some file types, especially plain-text files, are harder to spot by this method and if you want to check the type you have to use a parser for every kind of file you have to consider. For example if you want to spot SVG you can use is-svg library from NPM.

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