typescriptwebstormoptional-chaining
TS1109, WebStorm incorrectly reacting on optional chaining
WebStorm thinks it is a ternary operator and expects expressions and colon next. Maybe it thinks it is a TS code, while this is JS code in .js file, I'm not sure.
How can I switch this inspection off?
Solution
TypeScript compiler service reports the error here because optional chaining is not supported in TypeScript < 3.7. Service is used for JavaScript linting if the service is enabled in Settings | Languages & Frameworks | TypeScript and "allowJs" is set to true in tsconfig.json.
If you only want the service to compile/lint TypeScript, make sure that "allowJs" is either not set or set to false in tsconfig.json
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