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67 packages found
Check if `this` is truthy.
Check if a script is running on CircleCI
A helper function for the FalseJS library that checks if a value is true.
Check if a given value is one of the ESLint severity level specifiers
Boolean package provides functionality to generate a fake boolean value.
return true or false
A simple function to check if a piece of data is truthy. JavaScript version.
- true
- false
- truthy
- falsy
- javascript
- validation
- checking
- data validation
- object validation
- array validation
- set validation
- map validation
A package that check if an operation, usually functions call, is successful. It returns true or false depending on the operation
Utilities and types to help with simple Boolean checks
Returns true if the argument is a function; false otherwise.
TypeScript generics to work with boolean types
The missing parseBool function we all secretly want
THE BRINGER OF TRUTH! or false
Returns true if the argument is a string; false otherwise.
Tests a value’s type against a string like 'positive integer' or 'non-empty map'.
Helps you deny the existence of specified truthy values (e.g. 'someString', aParticularObject)
Random Boolean package provides functionality to generate a random boolean value.
A plugin for chai to allow you to test what is bollocks and what is the dog's bollocks.
Is it true? Is it false? Who knows? Who cares?