938 packages found

    Get the native type of a value.

    published 6.0.3 3 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.

    published 0.4.0 2 years ago
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    Check if something is a Node.js stream

    published 3.0.0 a year ago
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    Check if a value is a plain object

    published 4.1.0 2 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 4 years ago
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    Returns true if an object was created by the `Object` constructor, or Object.create(null).

    published 5.0.0 2 years ago
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    A little library for asserting types and values.

    published 11.1.2 3 years ago
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    Returns true if the value is an object and not an array or null.

    published 4.0.0 3 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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    Infer the content-type of a request.

    published 1.6.18 3 years ago
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    Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

    published 2.0.2 4 years ago
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    Function argument validation for humans

    published 1.0.0 2 months ago
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    Detect the file type of a Buffer/Uint8Array/ArrayBuffer

    published 17.1.6 17 days ago
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    unist utility to check if a node passes a test

    published 5.1.1 a year ago
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    Returns true if a value has the characteristics of a valid JavaScript accessor descriptor.

    published 3.0.1 4 years ago
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    Returns true if a value has the characteristics of a valid JavaScript data descriptor.

    published 2.0.0 4 years ago
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    Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for data descriptors and accessor descriptors.

    published 3.0.0 4 years 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.

    published 2.0.7 a year ago
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    Test if a double-precision floating-point numeric value is NaN.

    published 0.0.8 6 months ago
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