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Update documentation to mention that --strictNullChecks flag is necessary for --strictPropertyInitialization to have an effect #23659
Description
TypeScript Version:
2.7.0 and above.
Search Terms:
strictNullChecks strictPropertyInitialization
Code
class C {
foo: number;
bar = "hello";
baz: boolean;
constructor() {
this.foo = 42;
}
}Expected behavior:
TS documentation should mention that --strictNullChecks flag is needed for --strictPropertyInitialization one to actually have an effect.
This would properly document the actual code change in this commit :
This was clearly mentionned in the corresponding PR description.
Also mihailik suggested that a warning could also be emitted. Has this been done?
Actual behavior:
This is mentioned nowhere in the documentation.
Documentation for --strictPropertyInitialization is Ensure non-undefined class properties are initialized in the constructor..
To determine if a class property is non-undefined, --strictNullChecks flag must be turned on.
Related Issues:
I found no existing issue for updating the documentation about this.
Activity
[-]Update documentation to mention that `--strictNullChecks` is necessary for `--strictPropertyInitialization` to have an effect [/-][+]Update documentation to mention that --strictNullChecks flag is necessary for --strictPropertyInitialization to have an effect [/+]mhegazy commentedon Apr 24, 2018
A PR to warn for use of
--strictPropertyInitializationwith no--strictNullCheckswould be welcomed. The fix should be added in 'verifyCompilerOptions'.mhegazy commentedon Apr 24, 2018
Also a PR to update the docs would be welcomed, the handbook is at https://github.com/Microsoft/TypeScript-Handbook
a-tarasyuk commentedon Apr 24, 2018
Mohamed Hegazy (@mhegazy) I'll make PR for that case.
Mention strictPropertyInitialization requires strictNullChecks
Mention strictPropertyInitialization requires strictNullChecks