Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

If you want to check whether the variable has value

Returns true if a value has the characteristics of a valid JavaScript data descriptor.

Test if an object has a specified property.

Copy a descriptor from object A to object B

Simple key-value storage with support for multiple backends

Does the environment have full property descriptor support? Handles IE 8's broken defineProperty/gOPD.

Checks if array has a value.

Does this environment have the ability to get the [[Prototype]] of an object on creation with `__proto__`?

Check if argv has a specific flag

A query library for ECMAScript AST using a CSS selector like query language.

Transforms css values and at-rule params into the tree

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

Match a Unicode property or property alias to its canonical property name per the algorithm used for RegExp Unicode property escapes in ECMAScript.

JavaScript parser and stringifier for YAML

Persistent ordered mapping from strings

Light ECMAScript (JavaScript) Value Notation - human written, concise, typed, flexible

Async value container

Efficiently test whether an object contains the specified value

Checks if the given array has the search item (Type: string | number | boolean | object | array | null | undefined) based on the given options.