var-defined
A few handy javascript utilities for testing variables
A few handy javascript utilities for testing variables
Utilities to determine if string is any of the following null, empty, undefined, NaN, or whitespace.
returns true if its argument is neither null nor undefined.
JSON isNull method
Checks if the given value is null.
Helps you confirm the existence of specified falsy values (e.g. 0)
A runtime assertion for preserving not-null and not-undefined invariants
JavaScript Optional class
null object pattern
Helper function to determine if something is undefined, null or empty
A nullable(Null safety) implementation. Inspired by Kotlin.
null or not test package by evan elad nova
/dev/null equivalent for connect-session
Flat-copy an object's keys to a new one that has no prototype.
Wrap a function to only run on non-null values
React js empty component that returns nothing. Not even <noscript>
Safe navigation using ES2015 Proxies
Prevent match API from the result of null
deadsimple JSON.stringify which cares less (omits decircularizes values)
return null component of react