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76 packages found
To check if the input is null, undefined, empty string, empty array, or an empty object
Returns true if a value exists, false if empty. Works with deeply nested values using object paths.
A simple package to check if input is null, undefined, or an empty string
Check if something exists (e.g. not null || undefined)
Check if the given value is of a specific type.
- check
- type
- typeof
- isArray
- isNumber
- isObject
- isNull
- isUndefined
- isNil
- isBoolean
- isString
- array
- number
- object
- View more
Check if `this` is truthy.
Coalesce for JavaScript. Returns the first value that is not undefined or null.
Check if a given value is empty in JS extending his "truthy" and "falsy" nature
Test if a value is null.
Checks if the given value is a window object.
Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)
- array
- assert
- assertion
- async
- async function
- async-function
- asyncFunction
- bool
- boolean
- browser
- check
- check-type
- checking
- class
- View more
A small set of functions to check value against a specific type
- type
- check
- guard
- isNumber
- isArray
- isString
- checker
- isFinite
- undefined
- null
- primitive
- isFunction
- function
- isUndefined
exists and allExist functions. plain and simple
Checks if the given value is null or undefined
Used to check if some of the arguments are null or undefined.
Check if a given object is null or empty
Ensure a path doesn't contain null bytes
use hasNil to traverse chained object properties and check for null or undefined values
Type safe variable checks
Allows parsing of an existential check in Babel