Allow custom component parent classes

[haggholm]

We have a shallow hierarchy of components, so very few things actually extend React.Component or React.PureComponent directly, which renders rules like react/display-name kind of useless. It would be very useful for us to be able to configure the detection of classes. Maybe something like settings.pragma could allow for a list or regex of parent classes? E.g. Component.isES6Component could look up a custom regex in addition to the default ^(${pragma}\\.)?(Pure)?Component$.

(This looks pretty easy to me, though I’m not super familiar with the shared config; but if this would be welcome, I’d be happy to create a PR.)

[ljharb]

Having a hierarchy of React components is a very very big antipattern that's extremely discouraged by the React team, as well as the entire React community - you should prefer composition over inheritance.

There's a JSDoc comment that you can use to indicate to this plugin that your class is intending to be a React component, see #1220 (comment)

(see #986, #1048, #827, #1220, etc)

[haggholm]

Ah, shoot. I’m doing all I can to move functionality to HOCs and decorators, but the legacy code…ah well, c’est la vie.

[ljharb]

The JSDoc comment will allow you to lint your legacy code while you gradually fix it :-)