TypeError: Cannot read properties of undefined (reading 'headersSent')

typeerror-cannot-read-properties-of-undefined-reading-headerssent.md

it wasn't a problem with Express, but an issue with my coding style. Because I don't use semicolons the error ocurred.

app.use(...)

(async () => {
   ...
})()

The code gets transpiled as the app.use(...) returns a fn, that the async fn will init, so what I did was adding a semicolon before the async fn so the code would look like this:

app.use(...)

;(async () => {
   ...
})()

orginal issue discussion