willMount for server side rendering

[viebel]

In React Server side rendering, componentDidMount is not triggered.
On the other hand, ReasonReact doesn't have willMount but only didMount.

What can I do if I need componentDidMount in server side?

[chenglou]

Can you also list one concrete use-case please? Just for reference

[viebel]

My use case is that I want to create component that updates the page title.
Something like that:
<Title title="my article" />

The implementation in client side to call the side-effect inside didMount.

But, didMount is not triggered in server side rendering.

[maarekj]

Do put the code in the constructor is enough?

[chenglou]

Note that this wouldn't work with streaming, in reactjs, anyway

[maarekj]

Yes, but streaming is optional. No ?

[maarekj]

Finally it's planned to add willMount?

[nabati]

My use case is that I want to create component that updates the page title.
Something like that:

<Title title="my article" />

Instead of imperatively updating the title once the component has been mounted, how about rendering the correct title from the beginning? This could possibly hint to somewhere where you could improve your design.

Also, in ReactJS, none of the lifecycle-hooks are run on server rendering AFAIK.

[maarekj]

Precisely, the lifecycle-hook UNSAFE_componentWillMount is the only lifecycle-hook to fire on the server, before the component is mounted.

https://reactjs.org/docs/react-component.html#unsafe_componentwillmount

[rickyvetter]

I think SSR is fully supported with hooks. We aren’t planning on adding features to the record api.