Does not support TS decorators?

[kcsap]

Describe the bug

Does not support TS decorators? The return of reflect.getmetadata acquisition is null

The expected results are as follows:

Reproduction

npm run dev

System Info

node v12.5.0
npm V6.9.0
"vite": "^2.5.3",
"vue": "3.2.8",

Used Package Manager

npm

Logs

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to https://github.com/vuejs/vue-next instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[github-actions]

Hello @kcsap. Please provide a minimal reproduction using a GitHub repository or StackBlitz. Issues marked with need reproduction will be closed if they have no activity within 3 days.

[kcsap]

This is the source code

`
import {BaseController, Controller, Resource} from "csap-typescript-framework/lib";
import {TestService} from "@/api/service/TestService";
import {TestList, TestRequest, TestSearch} from "@/api/model/TestModel";
import {TestService2} from "@/api/service/TestService2";

@controller("product",)
export class TestController extends BaseController<TestService, TestRequest, TestSearch, TestList, number> {
@resource()
service: TestService;
@resource()
service2: TestService2;

getFormValidate(): Array<Function | TestRequest> {
    return [TestRequest];
}

getService(): TestService {
    return this.service;
}

getService2(): TestService2 {
    return this.service2;
}

test(): void {

}

}`

After operation

var __defProp = Object.defineProperty; var __getOwnPropDesc = Object.getOwnPropertyDescriptor; var __decorateClass = (decorators, target, key, kind) => { var result = kind > 1 ? void 0 : kind ? __getOwnPropDesc(target, key) : target; for (var i = decorators.length - 1, decorator; i >= 0; i--) if (decorator = decorators[i]) result = (kind ? decorator(target, key, result) : decorator(result)) || result; if (kind && result) __defProp(target, key, result); return result; }; import __vite__cjsImport0_csapTypescriptFramework_lib from "/node_modules/.vite/csap-typescript-framework_lib.js?v=1ae95b89"; const BaseController = __vite__cjsImport0_csapTypescriptFramework_lib["BaseController"]; const Controller = __vite__cjsImport0_csapTypescriptFramework_lib["Controller"]; const Resource = __vite__cjsImport0_csapTypescriptFramework_lib["Resource"]; import { TestRequest } from "/src/api/model/TestModel.js"; export let TestController = class extends BaseController { service; service2; getFormValidate() { return [TestRequest]; } getService() { return this.service; } getService2() { return this.service2; } test() { } }; __decorateClass([ Resource() ], TestController.prototype, "service", 2); __decorateClass([ Resource() ], TestController.prototype, "service2", 2); TestController = __decorateClass([ Controller("product") ], TestController);

There should be TS reflection type, which can be accessed by the reflect. GetMetadata () method

__metadata("design:type", Function)

[haoqunjiang]

That's not a valid reproduction.

[kcsap]

Esbuild does not support TS decorators, so is there any other solution? I don't want to use webpack too slowly. It's mainly the development environment. Thank you.

[haoqunjiang]

esbuild does support TypeScript experimentalDecorators.

[haoqunjiang]

emitDecoratorMetadata can't be supported though. It needs a type system https://esbuild.github.io/content-types/#no-type-system