3068 packages found

Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for data descriptors and accessor descriptors.

published 3.1.0 a month ago
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TypeScript-first schema declaration and validation library with static type inference

published 3.21.4 3 months ago
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the definitive JavaScript type testing library

published 3.3.0 4 years ago
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Detect the file type of a Buffer/Uint8Array/ArrayBuffer

published 18.4.0 25 days ago
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Returns true if a value has the characteristics of a valid JavaScript data descriptor.

published 2.1.1 a month ago
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Returns true if a value has the characteristics of a valid JavaScript accessor descriptor.

published 3.0.2 a month ago
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Get the native type of a value.

published 6.0.3 3 years ago
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Improved typeof detection for node.js and the browser.

published 4.0.8 5 years ago
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Check if a path is a file, directory, or symlink

published 5.0.0 2 years ago
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ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.

published 1.2.1 4 years ago
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unist utility to check if a node passes a test

published 5.2.1 3 months ago
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Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.

published 7.0.0 5 years ago
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unist utility to select nodes with CSS-like selectors

published 4.0.3 4 months ago
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Returns true if an object was created by the `Object` constructor, or Object.create(null).

published 5.0.0 3 years ago
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Check if something is a Node.js stream

published 3.0.0 2 years ago
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Determine if an object is a Stream

published 0.1.2 8 years ago
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A little library for asserting types and values, with zero dependencies.

published 11.2.2 6 months ago
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Function argument validation for humans

published 1.1.1 4 months ago
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Stringify an object/array like JSON.stringify just without all the double-quotes

published 5.0.0 5 months ago
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Avro for JavaScript

published 5.7.7 7 months ago
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