That behaviour is only enabled if `--strictNullChecks` is set to true. Otherwise... | Hacker News

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jahewson on Sept 22, 2016 | parent | context | favorite | on: Announcing TypeScript 2.0

That behaviour is only enabled if `--strictNullChecks` is set to true. Otherwise, by default all types include null/undefined just like in TypeScript 1.x. So it's entirely opt-in.

ng12 on Sept 22, 2016 [–]

But it's all or nothing right? If I write a new component in a pre-2.0 codebase and want strict null checks, I can't get them.

k__ on Sept 22, 2016 | [–]

I saw some comments in TypeScript code-bases, that excluded parts of the code.

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