Detect the file type of a Buffer/Uint8Array/ArrayBuffer
Determine if an object is a Buffer
Media Type Database
A little library for asserting types and values.
Get the native type of a value.
Check if something is a promise
Infer the content-type of a request.
Runs typescript type checker and linter on separate process.
Returns true if an object was created by the `Object` constructor.
Determine if an object is a Stream
Returns true if the value is an object and not an array or null.
Check if a string or buffer is SVG
Check if something is a Node.js stream
Type check values
Select unist nodes using css-like selectors
ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.
Utility to check if a node passes a test
Stringify an object/array like JSON.stringify just without all the double-quotes
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