JuniorTheoryCommon

What does tsc report for this code?

TypeScript

class Counter {
    count: number;
    step: number = 1;
}

const c = new Counter();
console.log(c.count, c.step);

An error: the field count has no initial value

Expecting count to be left undefined as in JavaScript: strict mode requires every field to get a value in its declaration or in the constructor, and count gets neither.
Expecting a number field to start at 0: TypeScript adds no default values, so without an initializer the field would hold undefined.

JuniorTheoryCommon

TypeScript

class Counter {
    count: number;
    step: number = 1;
}

const c = new Counter();
console.log(c.count, c.step);

An error: the field count has no initial value

Expecting count to be left undefined as in JavaScript: strict mode requires every field to get a value in its declaration or in the constructor, and count gets neither.
Expecting a number field to start at 0: TypeScript adds no default values, so without an initializer the field would hold undefined.