https://github.com/enncy/custom-decorator
easier to create your javascript custom decorator
https://github.com/enncy/custom-decorator
custom-decorator decorator javascript reflect-metadata typescript
Last synced: 3 months ago
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easier to create your javascript custom decorator
- Host: GitHub
- URL: https://github.com/enncy/custom-decorator
- Owner: enncy
- License: mit
- Created: 2024-01-22T08:53:25.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2024-01-25T09:12:09.000Z (over 1 year ago)
- Last Synced: 2025-02-27T07:29:27.293Z (3 months ago)
- Topics: custom-decorator, decorator, javascript, reflect-metadata, typescript
- Language: TypeScript
- Homepage:
- Size: 39.1 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: readme.md
- License: LICENSE
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README
# custom-decorator
> `custom-decorator` making it easier for you to customize decorators to get/set reflect-metadata values
```sh
npm i custom-decorator
```
## Example
```ts
import { CustomDecorator } from 'custom-decorator';
// example
export function Decorator(val: string): ClassDecorator {
return (target) => {
CustomDecorator.setClassMetadata(Decorator, target, val);
};
}
@Decorator('hello')
class A {}
console.log(CustomDecorator.getClassMetadata(Decorator, A)); // hello
// simplify
function SimplifyDecorator(val: string) {
return CustomDecorator.classFactory(SimplifyDecorator, val);
}
function TestMethod(val: string) {
return CustomDecorator.methodFactory(TestMethod, val);
}
function TestParameter(num: number) {
return CustomDecorator.parameterFactory(TestParameter, num * 2);
}
@SimplifyDecorator('hello')
class B {
@TestMethod('test')
test(@TestParameter(2) test: number) {}
}
console.log(CustomDecorator.getClassMetadata(SimplifyDecorator, B)); // hello
console.log(CustomDecorator.getPropertyMetadata(TestMethod, new B(), 'test')); // test
console.log(CustomDecorator.getParameterMetadata(TestParameter, new B(), 'test', 0)); // 4
```
**defineGetter** : define getter by decorator-value type mapping
```ts
import { CustomDecorator } from 'custom-decorator';
/**
* type prompt
*/
const getter = CustomDecorator.defineGetter<{
TestMethod: [typeof TestMethod, string];
TestParameter: [typeof TestParameter, number];
}>();
console.log(getter.TestMethod(new B(), 'test'));
// type: string
// value: 'test'
console.log(getter.TestParameter(new B(), 'test', 0));
// type: number
// value: 4
```