A robust TypeScript class for type checking and validation.
The Typer class provides a comprehensive type checking and validation utility for TypeScript projects. It includes methods for verifying the types of various data structures, ensuring that values meet specified criteria, and validating inputs in a consistent manner.
Install the package via NPM:
npm i data-type-validator
Methods
isArrayOf(elementType: string, p: any): any[] | void
Checks if the provided parameter is an array of a specified type.
isEmail(p: any): string | void
Checks if the provided parameter is a valid email address.
isInRange(min: number, max: number, p: any): number | void
Checks if the provided parameter is a number within a specified range.
isInteger(p: any): number | void
Checks if the provided parameter is an integer.
isNonEmptyArray(p: any): any[] | void
Checks if the provided parameter is a non-empty array.
isNonEmptyString(p: any): string | void
Checks if the provided parameter is a non-empty string.
isOneOf(values: any[], p: any): any[]
Checks if the provided parameter is one of the specified values.
isPhoneNumber(p: any): string | void
Checks if the provided parameter is a valid phone number.
isPositiveNumber(p: any): number | void
Checks if the provided parameter is a positive number.
isPositiveInteger(p: any): number | void
Checks if the provided parameter is a positive integer.
isNegativeNumber(p: any): number | void
Checks if the provided parameter is a negative number.
isNegativeInteger(p: any): number | void
Checks if the provided parameter is a negative integer.
isURL(p: any): string | void
Checks if the provided parameter is a valid URL.
isType(types: any[] | string, p: any): any | void
Checks if the parameter matches one of the specified types.
expect(funct: Function, types: { paramTypes: string | string[], returnType: string | string[] }): Function
Expects a function to conform to specified input and output types.