TypeScript decorators composition

decorators-composition.ts

class Test {
    public name: string;

    constructor(name: string) {
        this.name = name;
    }

    @a()
    @b()
    @c()
    public appendTextToName(text: string) {
        this.name += text;
        return this.name;
    }
}


function a() {
    console.log('a(): evaluated');
    return function (target: any, propertyKey: string, descriptor: PropertyDescriptor) {
        console.log('a(): called');
    }
}

function b() {
    console.log('b(): evaluated');
    return function (target: any, propertyKey: string, descriptor: PropertyDescriptor) {
        console.log('b(): called');
    }
}


function c() {
    console.log('c(): evaluated');
    return function (target: any, propertyKey: string, descriptor: PropertyDescriptor) {
        console.log('c(): called');
    }
}