is

the definitive JavaScript type testing library

v3.3.0 URL: https://unpkg.com/is@3.3.0/index.js

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is-stream

Check if something is a Node.js stream

v4.0.1 URL: https://unpkg.com/is-stream@4.0.1/index.js

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stream type streams writable readable duplex transform check detect is

is-obj

Check if a value is an object

v3.0.0 URL: https://unpkg.com/is-obj@3.0.0/index.js

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object is check test type

is-buffer

Determine if an object is a Buffer

v2.0.5 URL: https://unpkg.com/is-buffer@2.0.5/index.js

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arraybuffer browser browser buffer browserify buffer buffers core buffer dataview float32array float64array int16array int32array type typed array uint32array

is-plain-obj

Check if a value is a plain object

v4.1.0 URL: https://unpkg.com/is-plain-obj@4.1.0/index.js

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object is check test type plain vanilla pure simple