VADE
(Validate Decorator)
Simple class validator for Deno using TypeScript Decorators with built-in class transformer.
Key Features
- Made for Deno
- Type-safe
- Lightweight
- Extendable
- Zero dependencies
How To Use
Simply create a Class (or Model) using TypeScript Decorators and run validate. If you need more validator types: write issue, create merge request or implement it yourself and only use it locally.
import {
validate,
createValidator,
IsNumber,
IsString,
SetDefault,
} from 'https://deno.land/x/vade/mod.ts';
// Custom validator
const IsHigherThen = createValidator((value: number) => {
return (prop) => {
return prop > value;
};
});
// Our example model/class
class ExampleClass {
@IsNumber()
@IsHigherThen(10)
specialNumber!: number;
@SetDefault('default value')
@IsString()
randomValue!: string;
}
// ---------- //
// Valid
const obj1 = new ExampleClass();
obj1.specialNumber = 13;
obj1.randomValue = 'asd';
console.log(validate(obj1, ExampleClass));
// ExampleClass { specialNumber: 13, randomValue: "asd" }
// ---------- //
// Invalid
const obj2 = new ExampleClass();
obj2.specialNumber = 9; // Failed
obj2.randomValue = 'asd';
console.log(validate(obj2, ExampleClass));
// null
// ---------- //
// Invalid
const obj3 = new ExampleClass();
// Failed -> no specialNumber
obj3.randomValue = 'asd';
console.log(validate(obj3, ExampleClass));
// null
// ---------- //
// Valid
const obj4 = { specialNumber: 14, randomValue: 'cool' };
console.log(validate(obj4, ExampleClass));
// ExampleClass { specialNumber: 14, randomValue: "cool" }
// ---------- //
// Valid -> randomValue has a default value
const obj5 = { specialNumber: 14 };
console.log(validate(obj5 as any, ExampleClass));
// ExampleClass { specialNumber: 14, randomValue: "default value" }
// ---------- //
// Invalid -> unknown nice property
const obj6 = { specialNumber: 14, randomValue: 'cool', nice: true };
console.log(validate(obj6, ExampleClass));
// nullTODO
- add more built-in types (feel free to contribute)
Known issues
–
Contributing
Feel free to open merge requests!
License
MIT