ts-metadata-helper

An implementation of wrapper ES7 reflect metadata at TypeScript 2.0.

Features

Compatible with the Angular 2.0.0 annotations.

Dependencies

* core-js

Installation

First you need to install the npm module:
``sh
npm install ts-metadata-helper --save
`

Use

`typescript
import {Input, Output, Component} from '@angular/core';
import {PropertyAnnotationFactory, IAnnotation, MetadataHelper} from 'ts-metadata-helper/index';

...

class ViewFieldMetadata {
configValue:number;

constructor(config) {
this.configValue = config.configValue;
}
}

const ViewField:IAnnotation = PropertyAnnotationFactory(ViewFieldMetadata);

@Component({
template: '

Template

'
})
class View {
@ViewField({configValue: 100})
private field1:string;

@ViewField({configValue: 200})
private field2:number;

@Input()
private field3:number;

@Input()
private field4:number;

@Output()
private field5:number;
}

const viewInstance:View = new View();

expect(Object.keys(MetadataHelper.findPropertyMetadata(viewInstance, ViewField))).toEqual(['field1', 'field2']);
expect(Object.keys(MetadataHelper.findPropertyMetadata(viewInstance, Input))).toEqual(['field3', 'field4']);
expect(Object.keys(MetadataHelper.findPropertyMetadata(viewInstance, Output))).toEqual(['field5']);

const annotationMetadataHolder:IAnnotationMetadataHolder = MetadataHelper.findPropertyMetadata(viewInstance, ViewField);
expect(Reflect.get(Reflect.get(annotationMetadataHolder, 'field1'), 'configValue')).toBe(100);
expect(Reflect.get(Reflect.get(annotationMetadataHolder, 'field2'), 'configValue')).toBe(200);

expect(
Reflect.get(MetadataHelper.findAnnotationsMetaData(View, Component)[0], 'template')
).toEqual('

Template

');
`

Publish

`sh
npm run deploy
``

License

Licensed under MIT.