fix(core, devtools): optimize event emissions

[harry-whorlow]

No description provided.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 9d51af5

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 299ede7

Command	Status	Duration	Result
nx affected --targets=test:sherif,test:knip,tes...	✅ Succeeded	1m 20s	View ↗
nx run-many --target=build --exclude=examples/**	✅ Succeeded	24s	View ↗

---

☁️ Nx Cloud last updated this comment at 2025-09-23 20:14:55 UTC

[pkg-pr-new]

More templates

• @tanstack/form-example-angular-array
• @tanstack/form-example-angular-large-form
• @tanstack/form-example-angular-simple
• @tanstack/form-example-angular-standard-schema
• @tanstack/form-example-lit-array
• @tanstack/form-example-lit-simple
• @tanstack/form-example-lit-standard-schema
• @tanstack/form-example-lit-ui-libraries
• @tanstack/form-example-react-array
• @tanstack/form-example-react-compiler
• @tanstack/form-example-react-devtools
• @tanstack/form-example-react-dynamic
• @tanstack/field-errors-from-form-validators
• @tanstack/form-example-react-large-form
• @tanstack/form-example-react-next-server-actions
• @tanstack/form-example-react-query-integration
• @tanstack/form-example-remix
• @tanstack/form-example-react-simple
• @tanstack/form-example-react-standard-schema
• @tanstack/form-example-react-tanstack-start
• @tanstack/form-example-react-ui-libraries
• @tanstack/form-example-solid-array
• @tanstack/form-example-solid-large-form
• @tanstack/form-example-solid-simple
• @tanstack/form-example-solid-standard-schema
• @tanstack/form-example-svelte-array
• @tanstack/form-example-svelte-simple
• @tanstack/form-example-svelte-standard-schema
• @tanstack/form-example-vue-array
• @tanstack/form-example-vue-simple
• @tanstack/form-example-vue-standard-schema

@tanstack/angular-form

npm i https://pkg.pr.new/@tanstack/angular-form@1758

@tanstack/form-core

npm i https://pkg.pr.new/@tanstack/form-core@1758

@tanstack/form-devtools

npm i https://pkg.pr.new/@tanstack/form-devtools@1758

@tanstack/lit-form

npm i https://pkg.pr.new/@tanstack/lit-form@1758

@tanstack/react-form

npm i https://pkg.pr.new/@tanstack/react-form@1758

@tanstack/react-form-devtools

npm i https://pkg.pr.new/@tanstack/react-form-devtools@1758

@tanstack/solid-form

npm i https://pkg.pr.new/@tanstack/solid-form@1758

@tanstack/svelte-form

npm i https://pkg.pr.new/@tanstack/svelte-form@1758

@tanstack/vue-form

npm i https://pkg.pr.new/@tanstack/vue-form@1758

commit: 299ede7

[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 90.35%. Comparing base (6892ed0) to head (299ede7).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/form-core/src/FormApi.ts	87.50%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1758   +/-   ##
=======================================
  Coverage   90.35%   90.35%           
=======================================
  Files          38       38           
  Lines        1752     1753    +1     
  Branches      444      444           
=======================================
+ Hits         1583     1584    +1     
  Misses        149      149           
  Partials       20       20           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.