7 ms·

Does that render() call in the useState function would still render the changed elements only?

• lxe 7y ago
  No, render is global in this example. If you need to only render the component wrapping the useState, you have to track the caller (See https://github.com/facebook/react/blob/master/packages/react-reconciler/src/ReactFiberHooks.js#L169-L178 https://github.com/facebook/react/blob/master/packages/react...)
  • leowoo91 7y ago
    That is interesting, earlier I enabled flash painting in your codepen and it only re-rendered/flashed the specific component that has a value changed. Maybe that was a browser feature (safari) I will look into tracking to understand what you mean.. (or maybe it's a coincidence it works as expected)
  • nohuhu 7y ago
    (shameless plug!) ... or you can use something like Statium's ViewModel, which is basically a hierarchically linked, locally scoped state container component: https://github.com/riptano/statium https://github.com/riptano/statium RealWorld example: https://github.com/nohuhu/react-statium-realworld-example-app https://github.com/nohuhu/react-statium-realworld-example-ap... Sorry... Just... Couldn't... :)