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().string().nullable();
 
const validateA = exampleSchema.validate(null);
const validateB = exampleSchema.validate("hi");
const validateC = exampleSchema.validate(undefined);
const validateD = exampleSchema.validate(123);
 
console.log(validateA); // true
console.log(validateB); // true
console.log(validateC); // false
console.log(validateD); // false