npm

566 packages found

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A little library for asserting types and values.

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published 10.1.2a month ago
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Detect the file type of a Buffer/Uint8Array/ArrayBuffer

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published 12.4.019 days ago
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Runs typescript type checker and linter on separate process.

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published 3.1.011 days ago
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Check if something is a promise

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published 3.0.05 months ago
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Check if a string or buffer is SVG

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published 4.2.06 months ago
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Check if something is a Node.js stream

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published 2.0.07 months ago
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Returns true if an object was created by the `Object` constructor.

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published 3.0.07 months ago
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Returns true if the value is an object and not an array or null.

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published 4.0.07 months ago
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Get the native type of a value.

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published 6.0.22 years ago
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Infer the content-type of a request.

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published 1.6.187 months ago
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Check if a value is a plain object

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published 2.0.07 months ago
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Check if a path is a file, directory, or symlink

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published 4.0.08 months ago
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Check if a value is an object

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published 2.0.07 months ago
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Description

A type checking library where each exported function returns either true or false and does not throw. Also added tests.

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published 2.0.46 months ago
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Function argument validation for humans

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published 0.15.07 days ago
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Check if a value is an Observable

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published 2.0.06 months ago
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Returns true if a value has the characteristics of a valid JavaScript accessor descriptor.

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published 3.0.1a year ago
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Utility to check if a node passes a test

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published 4.0.19 days ago
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Description

Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.

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published 7.0.0a year ago