Add active prop to reduxForm

[vitbokisch]

Adding new prop passing to form via reduxForm. The value shows up when any field is active, but it is not passing to form at all. The prop, for example, helps doing more ux stuff like showing form as a modal when user is interacting withing the form and so on. Hope this proposal is worthy for you as well.

[codecov-io]

Codecov Report

Merging #2856 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master   #2856   +/-   ##
======================================
  Coverage     100%    100%           
======================================
  Files          67      67           
  Lines        1395    1396    +1     
======================================
+ Hits         1395    1396    +1

Impacted Files	Coverage Δ
src/propTypes.js	100% <ø> (ø)	⬆️
src/reduxForm.js	100% <100%> (ø)	⬆️

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[gustavohenke]

LGTM, but a prop saying the name of the active field would probably be more useful than this one.

[vitbokisch]

You are right, I'm gonna update it

[gustavohenke]

LGTM. Thoughts, @erikras?

[erikras]

Pro: definitely seems useful
Con: adds another reason for the entire form to rerender

When you tab from input 'foo' to input 'bar' form to another, does the active prop ever === undefined in its way between the two values?

[erikras]

v5 had this and it was removed as a conscious decision in the rewrite of v6 to minimize form rerenders. I think this should be a selector. It would be trivial to write (use #2859 as a guide). I'd accept that PR. Going to close this one.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.