Cursor
api
TypeScript Strict Mode Errors After Refactoring
After enabling or upgrading TypeScript strict mode, Cursor's refactored code now has many type errors. The strict rules catch null/undefined issues and type mismatches that were previously ignored.
Code needs proper typing to satisfy strict mode requirements.
Error Messages You Might See
Object is possibly 'null'
Type 'any' is not assignable
Property does not exist on type
Argument of type 'unknown' not assignable
Common Causes
- Variables not initialized, inferred as 'any' type
- Null/undefined not handled, accessing properties on potentially null values
- Function return type not specified
- Parameters not typed, defaulting to 'any'
- Using 'any' type to bypass checks
How to Fix It
Add types: const value: string = 'hello'. Function returns: function getName(): string { }. Handle null: value?.property || default. Use NonNullAssert if sure: value!. Enable strict in tsconfig: "strict": true.
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Get HelpFrequently Asked Questions
What does !mean in TypeScript?
Non-null assertion operator. Tells compiler you know value isn't null. Use sparingly - usually fix the root cause.
How do I fix 'possibly null' errors?
Add null check: if (value) { ... }. Or optional chaining: value?.property. Or default: value || defaultValue.