PropTypes throwing errors in production? about prop-types

[gaearon]

This was an intentional breaking change inprop-types itself (as it is a completely new package) but I didn’t fully realize we switched React 15.5 to actually use the prop-types (and thus trigger the error).

We need to put out a fix for this asap, thanks for reporting.

[gaearon]

Fixed in [email protected].

[franjohn21]

Codepen: http://codepen.io/franjohn21/pen/Wjeemd

[franjohn21]

If I'm reading the docs correctly, this functionality should throw an error in a future major release.

In a future major release of React, the code that implements PropType validation functions will be stripped in production. Once this happens, any code that calls these functions manually (that isn't stripped in production) will throw an error.

So throwing an error now is unintentional and breaks production builds particularly where 3rd party libraries manually called proptype functions.

[Daniel15]

This seems to be an intentional design choice. From the readme in this repo:

In production, all validator functions are replaced with empty functions that throw an error. This is done to optimize the bundle size.

I suspect the reasoning is that proptype checks are usually only done in development. However, I wonder why it doesn't just become a no-op in production, rather than throwing 😕

[aweary]

Maybe @acdlite or @gaearon can shed some light on why prop-types is throwing in production before the next major React release.

[gaearon]

This is fixed in [email protected] and we'll update React 15.x to enforce depending on it soon.
In the meantime you should be able to run rm -rf node_modules and npm install to fix this.

[gaearon]

In case anyone is confused, the intended behavior is explained here:

https://github.com/reactjs/prop-types/blob/master/README.md#difference-from-reactproptypes-dont-call-validator-functions

I verified that [email protected] restores the old behavior for React.PropTypes, fixing the [email protected] problem.

[bvaughn]

[email protected] ^

[gaearon]

Thanks 😄 I keep typing that for some reason