Optional chaining in Typescript is reported as an expression

SonarCloud
1
  • versions used (SonarQube, Scanner, Plugin, and any relevant extension): cloud
  • error observed:
export default class Vimeo extends React.Component<Props> {
  constructor(p: Props) {
    super(p)
    this.player = null
  }
  private player: Player | null
  componentWillUnmount() {
    this.player?.destroy()
// => Expected an assignment or function call and instead saw an expression. Bug, Major, 10min effort
  }
// etc...
}
  • steps to reproduce: above code

I think your linter doesn’t support “optional chaining” https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-7.html#optional-chaining

3

Hello @haf, thanks for raising this problem.

I believe you are facing the issue already reported on github, you can have a look at it here.

I linked your post there.

Best,
Quentin

5

Great, I’m going to assume SonarCloud upgrades its parser to support all of TypeScript in due time, so I’m happy with not going any further now.