test decorator

src/test.ts

@@ -0,0 +1,59 @@
+function Component(id: number) {
+    console.log('init component')
+    return (target: Function) => {
+        console.log('run component')
+        target.prototype.id = id;
+    }
+}
+
+function Logger() {
+    console.log('init logger')
+    return (target: Function) => {
+        console.log('run logger')
+    }
+}
+
+function Method(target: Object, propertyKey: string, PropertyDescriptor: PropertyDescriptor) {
+    console.log(propertyKey)
+    PropertyDescriptor.value = function (...args: any[]) {
+        return args[0] * 10;
+    }
+}
+
+function Prop(target: Object, propertyKey: string) {
+    let value: number;
+
+    const getter = () => {
+        console.log('Get')
+        return value
+    }
+
+    const setter = (newValue: number) => {
+        console.log('Set')
+        value = newValue
+    }
+
+    Object.defineProperty(target, propertyKey, {
+        get: getter,
+        set: setter
+    })
+}
+
+function Param(target: Object, propertyKey: string, index: number) {
+    console.log(propertyKey, index)
+}
+
+@Logger()
+@Component(1) 
+export class User {
+    @Prop id: number;
+
+    @Method
+    updateId(@Param newId: number) {
+        this.id = newId;
+        return this.id;
+    }
+}
+
+console.log(new User().id);
+console.log(new User().updateId(2));