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15 packages found
Check whether a value is a `Generator` or `GeneratorFunction`. The `co` way, more strict checking. Always return boolean true or false, never null or undefined.
- check
- es2015
- es6
- es7
- function
- functions
- generator
- generatorfunction
- generators
- is
- is-function
- is-generator
- is-generator-function
- next
Used to check if some of the arguments are null or undefined.
A one-liner to check if a property is set (not null, undefined or empty string).
Check if a given object is null or empty
A utility to determine if a value is null or undefined
Test if a value is undefined or null.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- undefined
- void
- null
- is
- isundefined
- isnull
- View more
Checks if the given value is null or undefined
Validates if a value is undefined or null.
Determine if a value is not `undefined` or `null`
Determine if a value is not `undefined` or `null`
Helper function to determine if something is undefined, null or empty
Helper function to determine if something is undefined, null or empty
2 functions that check if argument is undefined or null
Returns true if an answer to a prompt is not undefined, null, an empty object, empty array, or a string with zero length.