type-validation

Library to validate variable typing and values during runtime. It is built to be used as an ES6 module.

The library follows the concept that typing or value mismatch is an error, so it throws errors if the validation fails. Here are some example usage:

import validate from './libraries/type-validation/validation';

const value = -1;

try {
    validate(value).number().positive();
} catch(errorValidatingValue) {
    console.log(errorValidatingValue); // logs "Value is NOT Positive"
}

Available Validations

defined()

Validates if value is defined (NOT undefined)

undefined()

Validates if the value is undefined

null()

Validates if the value is equal to null

notNull()

Validates if the value is NOT equal to null

function()

Validates if the value is a function

number()

Validates if the values is a number

number().min(limit)

Validates if the number is more than or equal to limit

• limit - the minimum value allowed

number().max(limit)

Validates if the number is less than or equal to limit

• limit - the maximum value allowed

number().positive()

Validates if the number is more than 0 (zero)

number().integer()

Validates if the number is an integer (no significative decimals)

string()

Validates if the value is a string

string().notEmpty()

Validates if the string is NOT an empty string ('')

string().maxLength(limit)

Validates if the string's length is less than or equal to the limit

• limit - the maximum allowed length

boolean()

Validates if the value is a boolean

object()

Validates if the value is an object

array()

Validates if the value is an array

htmlElement()

Validates if the value is an HTMLElement

values()

Validates if the value is in a list of values