TS 5.4.5装饰器语法兼容问题：本地项目与Playground行为不一致

问题现象 #

使用TypeScript 5.4.5版本时，新装饰器语法在TS Playground中可正常运行，但本地同配置项目中完全不生效；反之，旧版装饰器语法在本地项目中可正常工作。

新装饰器语法（TS Playground正常，本地无效） #

class Test {
    @loggedMethod
    private async sayHi(txt: string) {
        console.log(txt);
    }

    async difMethod() {
        this.sayHi('well');
    }
}

function loggedMethod(originalMethod: any, context: ClassMethodDecoratorContext) {
    const methodName = String(context.name);

    function replacementMethod(this: any, ...args: any[]) {
        console.log(`LOG: Entering method '${methodName}'.`);
        const result = originalMethod.call(this, ...args);
        console.log(`LOG: Exiting method '${methodName}'.`);
        return result;
    }

    return replacementMethod;
}

const tClass = new Test();
tClass.difMethod();

本地tsconfig.json配置 #

{
    "compilerOptions": {
        "target": "es5",
        "lib": [
            "dom",
            "dom.iterable",
            "esnext"
        ],
        // "experimentalDecorators": true,
        "suppressImplicitAnyIndexErrors": true,
        "allowJs": true,
        "skipLibCheck": true,
        "esModuleInterop": true,
        "allowSyntheticDefaultImports": true,
        "strict": true,
        "forceConsistentCasingInFileNames": true,
        "noFallthroughCasesInSwitch": true,
        "module": "esnext",
        "moduleResolution": "node",
        "resolveJsonModule": true,
        "isolatedModules": true,
        "noEmit": true,
        "jsx": "react-jsx"
    },
    "include": [
        "src"
    ]
}

旧版装饰器语法（本地正常生效） #

class Test {
    @loggedMethod
    private async sayHi(txt: string) {
        console.log(txt);
    }

    async difMethod() {
        this.sayHi('well');
    }
}

function loggedMethod(target: any, name: string, descriptor: PropertyDescriptor) {
    target[name] = function replacementMethod(this: any, ...args: any[]) {
        console.log(`LOG: Entering method '${name}'.`);
        const result = descriptor.value?.call(this, ...args);
        console.log(`LOG: Exiting method '${name}'.`);
        return result;
    };

    return target[name];
}

const tClass = new Test();
tClass.difMethod();

排查情况 #

1. 新旧语法核心差异在于装饰器函数的参数数量与类型：新语法接收originalMethod和context两个参数，旧语法接收target、name、descriptor三个参数。
2. 移除"experimentalDecorators": true配置后，旧版语法会抛出符合TS5.x文档规则的错误：Unable to resolve signature of method decorator when called as an expression. The runtime will invoke the decorator with 2 arguments, but the decorator expects 3.
3. 无论是否开启"experimentalDecorators": true，本地项目始终使用旧版装饰器逻辑。

请问还有哪些配置可能影响装饰器语法的生效逻辑？

内容的提问来源于stack exchange，提问作者Bastiat