this is undefined in componentDidUpdate

[erin-doyle]

I've found that in a 3rd party component I'm using, in an application where I'm also using react-a11y-alt, this is coming up as undefined in the componentDidUpdate() function. Using the component in other places does not have this issue.

It looks as if the react-a11y-alt after.js render() function patches componentDidUpdate as well as componentDidMount and when it does so it replaces the context with undefined:

original.apply(undefined, args);

It looks as if the component's context is available there and could be passed in as the thisArg instead of undefined, so I'm not sure why that isn't being done.

[erin-doyle]

Correction. The actual source code is:

original.apply(this, args);

It was only being transpiled from this to undefined. This looks to be a babel issue.