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Check if the required properties are set, the easy way!
Ensures value is defined (i.e., neither undefined nor null).
Improved type check
Optional module for JavaScript that provides interfaces to interact with potentially null/undefined values.
Erradicates undefineds with ancient magic powers
Validates if a value is a JavaScript primitive.
✅ Type validation for ES6+ and Typescript projects
Validation utilities.
- validate.io
- validator
- validation
- validate
- valid
- is
- isvalid
- check
- typed
- assert
- expect
- api
- string
- primitive
- View more
checks if foo is not defined, i.e. undefined, null, an empty string, array, object or NaN
Validates if a value is an array of JavaScript primitives.
- validate.io
- validate
- validation
- validator
- valid
- primitive
- array
- is
- null
- boolean
- string
- number
- undefined
- primitivearray
A package for judging a string is null or empty or undefined
Safe Window Getters
Return dotted keys containing undefined values within an object including deeply nested objects
This is a wrapper of JSON stringify that converts also undefined and null to string.
Two D's for a double dose of undefined
Return the first defined item in an array
Determine if a value is `undefined`
Get a value from object by path
Safe Window Getters
Return a value when a condition passes, otherwise return undefined