TSDocEnables experimental support for emitting type metadata for decorators which works with the module reflect-metadata.
For example, here is the TypeScript
ts
// @experimentalDecorators
function LogMethod(target: any, propertyKey: string | symbol, descriptor: PropertyDescriptor) {
console.log(target);
console.log(propertyKey);
console.log(descriptor);
}
class Demo {
@LogMethod
public foo(bar: number) {
// do nothing
}
}
const demo = new Demo();// @experimentalDecorators
function LogMethod(target: any, propertyKey: string | symbol, descriptor: PropertyDescriptor) {
console.log(target);
console.log(propertyKey);
console.log(descriptor);
}
class Demo {
@LogMethod
public foo(bar: number) {
// do nothing
}
}
const demo = new Demo();With emitDecoratorMetadata not set to true (default) the emitted JavaScript is:
ts
// @experimentalDecorators
// @showEmit
function LogMethod(target: any, propertyKey: string | symbol, descriptor: PropertyDescriptor) {
console.log(target);
console.log(propertyKey);
console.log(descriptor);
}
class Demo {
@LogMethod
public foo(bar: number) {
// do nothing
}
}
const demo = new Demo();// @experimentalDecorators
// @showEmit
function LogMethod(target: any, propertyKey: string | symbol, descriptor: PropertyDescriptor) {
console.log(target);
console.log(propertyKey);
console.log(descriptor);
}
class Demo {
@LogMethod
public foo(bar: number) {
// do nothing
}
}
const demo = new Demo();With emitDecoratorMetadata set to true the emitted JavaScript is:
ts
// @experimentalDecorators
// @showEmit
// @emitDecoratorMetadata
function LogMethod(target: any, propertyKey: string | symbol, descriptor: PropertyDescriptor) {
console.log(target);
console.log(propertyKey);
console.log(descriptor);
}
class Demo {
@LogMethod
public foo(bar: number) {
// do nothing
}
}
const demo = new Demo();// @experimentalDecorators
// @showEmit
// @emitDecoratorMetadata
function LogMethod(target: any, propertyKey: string | symbol, descriptor: PropertyDescriptor) {
console.log(target);
console.log(propertyKey);
console.log(descriptor);
}
class Demo {
@LogMethod
public foo(bar: number) {
// do nothing
}
}
const demo = new Demo();