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propType [name] is not required, but has no corresponding defaultProp declaration

See original GitHub issue

I am using Flow for type checking, and I have something like this:

type Props = {
  name?: ?string, // this means that "name" is NOT mandatory, and its value can be **null** or **undefined**
};

So, my question is, should I get this linting error? Is this the desired behavior?

Issue Analytics

State:
Created 6 years ago
Comments:6 (2 by maintainers)

Top GitHub Comments

96reactions

ljharbcommented, Dec 21, 2017

@AlexanderNaiden add:

Switcher.defaultProps = {
  isSmall: false,
};

20reactions

jseminckcommented, Sep 14, 2017

I would say this is as expected. Since the prop is not required, you should specify a default value. You can decide to set it to null or undefined by default.

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