npm install --save @nofrills/types
types also supports more complex type definitions, such as custom types. You can register your own types and ensure that your runtime instances truly match definitions you specify.
Is helper to validate basic types, such as
const isDate = Is.date(Date.now()) // false const isNumber = Is.number(Date.now()) // true const isString = Is.string('this is a string') // true
const isDate: boolean = Is.date(Date.now()) // false const isNumber: number = Is.number(Date.now()) // true const isString: boolean = Is.string('this is a string') // true
Types registry to retrieve or add type definitions for the runtime to validate.
Q: What is the difference between
Is helper is meant to be a basic type checker for primitives while
Types is meant to be used as a custom type validator.
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