是否有关于可选属性的属性访问的 Typescript-Eslint 规则？

Question

interface TypeA {
    optionalObj?: { prop: string }
}

const a: TypeA = {};

console.log(a.optionalObj.prop);

I want to find a Typescript-Eslint rule that will error on the line a.optionalObj.prop , because optionalObj can be undefined.

Is there such a rule?

Answer 1

This should be caught as a TS Error TS2532: Object is possibly 'undefined'.

If you're not seeing this error, fix your tsconfig.json . You should turn strictNullChecks on. Consider below flags.

   "strict": true,
    "alwaysStrict": true,