Schema - Nullable

The .nullable() method is used to validate whether a value can be null. The difference between the nullable and notRequired methods is:

• nullable: It can be null or any other type, except undefined.
• notRequired: It can be undefined or any other type.

This method is useful when you want to allow null as a valid value but prevent undefined.

Example

Below is an example of how to use .nullable() to validate whether a value can be null or any other type, except undefined:

import { schema } from "vkrun"
 
const exampleSchema = schema().number().nullable()
 
const validateA = exampleSchema.validate(null)
const validateB = exampleSchema.validate(undefined)
const validateC = exampleSchema.validate("123")
const validateD = exampleSchema.validate(123)
 
console.log(validateA) // true
console.log(validateB) // false
console.log(validateC) // false
console.log(validateD) // true