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549 packages found
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
Javascript number, string, boolean, object validator
json serializable rule engine / boolean expression evaluator
An expressive type testing library
Parse simple expressions, in a language of your own description
Boolean data type has two possible truth values to represent logic.
A Node-RED node to parse and convert several types of on/off, start/stop, true/false values.
Convert boolean to equivalent Yes or No in a given language
This module is small but easy to use. The purpose of this module is to serve as a container for all my validator modules. That has thirteen validator all in one module, the validators is as follows: bigger, contains, equal, longer, mqtt topic, regex, smal
Takes any JavaScript data type or object as an input and returns a string describing the type of the input.
Ask for a type, returns a true/false as answer.
Convert query strings to numbers and booleans for express/connect applications.
This module is small but easy to use. The purpose of this module is to check if a value is a array but if it is not an array it will convert the value into an array.
combine predicate (bool returning) functions with propositional logic connectives (and, or, not)
Joi Schema for boolean expressions
A utility to determine if a value is a boolean
A configurable defensive programming utility to guard against non-boolean values
Visualise AND and OR boolean circuits
Create a boolean expression that's safe to eval
Test for a USD currency formatted input