React Native 0.56 provides native support of Optional Chaining Operator i.e ?.
However the latest stable release of VS Code can not recognize this syntax and throw a TypeScript validation error:
[ts] Expression expected.
while no complie-time or eslint error was thrown.
How can I do to fix it?
Update on 2019/12/11:
Optional chaining is offically supported by TypeScript since 3.7! 😍
If you still meet this error, probably the TypeScript lib shipped with your VSCode is < 3.7.
You can fix it simply by installing the latest version of typescript (>= 3.7) to your workspace. (by npm or yarn as dev deps)
Then open the command palette, type tstv, and switch the TypeScript version used for JS and TS features from VS Code's Version to Workspace's Version (make sure it's >= 3.7) and voila!
This is definitely an awesome feature, thanks your all and happy hacking!