217 packages found

    Description

    exists and allExist functions. plain and simple

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    published 1.0.14 years ago
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    Description

    util for validation that object has defined props

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    published 1.2.24 years ago
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    Remove undefined variables from a GraphQL query

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    published 1.9.217 days ago
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    Description

    If value is null or undefined, it sets a default value instead.

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    published 0.0.86 years ago
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    A stateless implementation of the maybe monad

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    published 2.2.3a year ago
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    Try to parse a string as JSON and return undefined on failure

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    published 1.1.44 years ago
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    Description

    Optional chaining with a recursive ES6 Proxy

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    published 1.0.4a year ago
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    Check for a valid Number value.

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    published 1.0.15 years ago
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    Check if a value is undefined or not.

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    published 1.0.118 months ago
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    Description

    Disallow undefined property access in JavaScript

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    published 1.0.155 years ago
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    Description

    Check if a variable in a nested object is defined and optionally also check its type. Useful for verifying API responses.

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    published 1.2.1a year ago
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    Description

    Absent checks existence of variable, properties or items in a collection.

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    published 1.0.13 years ago
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    Description

    remove null/undefined values from objects

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    published 1.0.13 years ago
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    Description

    Check if `this` is truthy.

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    published 1.0.16 years ago
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    Returns true if the given is falsey (according to JavaScript) or matches a 'falsey' keyword.

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    published 1.0.03 years ago
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    Returns whether or not the passed arguments are defined - ie. not undefined

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    published 1.0.1a year ago
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    undefined is not a function and it's likely to remain so forever

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    published 1.0.34 years ago
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    Description

    All imaginable type checking utils with their negation

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    published 1.0.35 months ago
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    Description

    Simple set of functions to check variables. Includes check of undefined / defined / defined and not null / defined and not empty / is number / is function is object

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    published 1.0.53 years ago
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    Description

    Boilerplate-free Enzyme testing

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    published 3.0.14 years ago
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