1949 packages found

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Runtime validation and processing of JavaScript types

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published 2.1.0a month ago
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Returns true if an object was created by the `Object` constructor, or Object.create(null).

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published 5.0.018 days ago
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Detect the file type of a Buffer/Uint8Array/ArrayBuffer

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published 15.0.112 days ago
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ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.

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published 1.2.1a year ago
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Get the native type of a value.

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published 6.0.38 months ago
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Media Type Database

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published 1.45.04 days ago
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A little library for asserting types and values.

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published 11.1.28 months ago
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the definitive JavaScript type testing library

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published 3.3.02 years ago
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type-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax.

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published 0.4.06 months ago
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Determine if an object is a Stream

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published 0.1.26 years ago
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unist utility to select nodes with CSS-like selectors

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published 3.0.18 months ago
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unist utility to check if a node passes a test

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published 4.0.27 months ago
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Stringify an object/array like JSON.stringify just without all the double-quotes

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published 3.3.02 years ago
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Check if a value is a plain object

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published 2.1.08 months ago
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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 2.0.6a month ago
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Avro for JavaScript

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published 5.4.22a month ago
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Function argument validation for humans

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published 0.17.07 months ago
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Check if a string or buffer is SVG

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published 4.2.18 months ago