cannot redeclare block scoped variable postMessage()

🔎 Search Terms

"cannot redeclare block scope variable postMessage typescript"

🕗 Version & Regression Information

TS version: ^5.1.6

⏯ Playground Link

Can't use workers in Playground

💻 Code

const worker = new SharedWorker(new URL('./worker.js', import.meta.url))

/* ... */

worker.port.addEventListener('message', e => {
     if (!e.data?.type) {
          return
      }

      switch (e.data.type) {
          case 'get_tabs': {
               worker.port.postMessage({ //Error here
                   type: 'share_tab_id',
                   tab_id: tabId
               })
          }

    /* ... */

🙁 Actual behavior

I'm getting a Cannot redeclare block-scoped variable 'postMessage' error coming from TypeScript itself. I checked the file (lib.dom.d.ts) and it looks like the postMessage variable is getting declared twice

🙂 Expected behavior

Expect to have single declaration of postMessage and no error.

Additional information about the issue

I'm using a monorepo with NPM workspaces. Each module has a separate tsconfig.json and are built separately

Comienza con el ejemplo de SharedWorker y los archivos tsconfig.json separados del monorepo NPM-workspaces. Inspecciona las declaraciones duplicadas de postMessage en lib.dom.d.ts y determina por qué entran en el mismo programa de TypeScript; verifica la corrección reconstruyendo los módulos afectados y confirmando que el diagnóstico ha desaparecido.