validatte@v0.2.0

A Savory class validator for Deno.

Available decorators

Decorator	Description
Type validation decorators
`@IsBoolean()`	Checks if a value is a boolean.
`@IsString()`	Checks if the string is a string.
`@IsNumber()`	Checks if the value is a number.
`@IsBigInt()`	Checks if the value is a big int.
`@IsArray()`	Checks if the value is an array
`@IsObject()`	Checks if the value is an object
`@IsSymbol()`	Checks if the value is a Symbol
`@IsUndefined()`	Checks if the value is undefined
Number validation decorators
`@GreaterOrEqual(num: number)`	Checks if the value is greater than or equal to the specified number.
`@Greater(num: number)`	Checks if the value is greater than the specified number.
`@LowerOrEqual(num: number)`	Checks if the value is lower than or equal to the specified number.
`@Lower(num: number)`	Checks if the value is lower than the specified number.
String validation decorators
`@LengthGreaterOrEqual(num: number)`	Checks if the length is greater than or equal to the specified number.
`@LengthGreater(num: number)`	Checks if the length is greater than the specified number.
`@LengthLowerOrEqual(num: number)`	Checks if the length is lower than or equal to the specified number.
`@LengthLower(num: number)`	Checks if the length is lower than the specified number.
`@IsRegex(regex: RegExp)`	Checks if the string match the given RegExp.
`@IsEmail()`	Checks if the string is an email.
`@IsPhoneNumber(country: string)`	Checks if the string is a local phone number for a country. Country must be ISO 3166 c.a.d 2 letter code. Example: FR, US, UK, DE
`@IsInternationalPhoneNumber()`	Checks if the string is an international phone number with extension and with or without leading 0. Example: +330XXXXXXXXX or +33XXXXXXXXX
Object validation decorators
`@Nested(class: Class)`	Checks if the property is a valid “instance” of Class. This means that all Validators of Class will be checked on the given object. The property can either be a plain object or a class instance

Usage

Create a Class using TypeScript Decorators and run validateObject.

If you need more built-in validators, please open an issue or create merge request

import {
    createValidator,
    IsEmail, // this is a decorator (PascalCase)
    isEmail, // this is a check function, called behavior (camelCase)
    IsString,
    LengthLowerOrEqual,
    validateObject,
} from 'https://deno.land/x/validatte/mod.ts';

// Custom validator with custom error message containing argument. $constraint1 will be replaced by first argument. $constraint2 by second etc...
const IsWhiteListedEmailDomain = createValidator(
    (whiteListedDomain: string) => {
        return (prop) => {
            if (isEmail(prop)) {
                return false;
            }
            return prop.indexOf(`@${whiteListedDomain}`) !== -1;
        };
    },
    'Email shoud be from $constraint1 domain',
);

class User {
    @IsString()
    @IsEmail()
    @IsWhiteListedEmailDomain('mydomain.com')
    email!: string;
}

// ---------- //

// Valid
const user = new User();
user.email = 'myemail@mydomain.com';
console.log(validateObject(user, User));
// []

// ---------- //

// Invalid
const failingUser = new User();
failingUser.email = 'wrongemail@email.com';
console.log(validateObject(failingUser, User));

/*
[
    {
        property: 'email',
        errorMessage: `Email shoud be from mydomain.com domain`,
        constraints: ['mydomain.com'],
    },
];
*/

Come with us on this awesome journey

We always welcome contributors, feel free to submit a new feature or report a bug on our Github Repository and join our discord

License

MIT