breaking: Replace experimentalJustInTimeCompile flag with justInTimeCompile flag, make it true by default

[jennifer-shehane]

• Closes Make experimentalJustInTimeCompile default within Cypress #30234

Additional details

This removes the component testing specific experimentalJustInTimeCompile configuration and replaces it with a justInTimeCompile which is true by default.

Additionally, the just in time compile logic will now only apply to webpack and no longer to vite (which was not working well anyway with how vite works)

Steps to test

How has the user experience changed?

PR Tasks

• Have tests been added/updated?
• Has a PR for user-facing changes been opened in cypress-documentation?
• Have API changes been updated in the type definitions?

[cypress]

cypress    Run #58080

Run Properties:   Cancelled #58080  •  039144bfed: Merge branch 'release/14.0.0' into experimentalJIT-default

Project	cypress
Branch Review	experimentalJIT-default
Run status	Cancelled #58080
Run duration	31m 00s
Commit	039144bfed: Merge branch 'release/14.0.0' into experimentalJIT-default
Committer	Jennifer Shehane
View all properties for this run ↗︎

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Test results
Failures	17
Flaky	7
Pending	1308
Skipped	31
Passing	28654
View all changes introduced in this branch ↗︎

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Warning

Partial Report: The results for the Application Quality reports may be incomplete.

UI Coverage  42.3%
Untested elements	201
Tested elements	151

Accessibility  92.51%
Failed rules	3 critical   8 serious   2 moderate   2 minor
Failed elements	884

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Tests for review

  src/navigation/SidebarNavigation.cy.tsx • 1 failed test • app-ct

View Output

Test		Artifacts
SidebarNavigation > expands the bar when clicking the expand button		Test Replay Screenshots

  src/specs/generators/ExpandableFileChooser.cy.tsx • 1 failed test • app-ct

View Output

Test		Artifacts
> filters the files by file name		Test Replay

  cypress/e2e/commands/actions/hover.cy.js • 0 failed tests • 5x-driver-electron

View Output

Test		Artifacts

  cypress/e2e/cy/timeouts.cy.js • 0 failed tests • 5x-driver-electron

View Output

Test		Artifacts

  cypress/e2e/util/blob.cy.js • 0 failed tests • 5x-driver-electron

View Output

Test		Artifacts

The first 5 failed specs are shown, see all 180 specs in Cypress Cloud.

  src/specs/generators/ExpandableFileChooser.cy.tsx • 1 flaky test • app-ct

View Output

Test		Artifacts
> no results > does not show no results when there are files		Test Replay Screenshots

  src/components/promo/Promo.cy.tsx • 1 flaky test • app-ct

View Output

Test		Artifacts
> records event on initial render		Test Replay

  cypress/e2e/e2e/origin/commands/waiting.cy.ts • 1 flaky test • 5x-driver-chrome:beta

View Output

Test		Artifacts
... > throws when foo cannot resolve		Test Replay

  cypress/e2e/commands/waiting.cy.js • 1 flaky test • 5x-driver-chrome

View Output

Test		Artifacts
... > errors > throws when waiting for 2nd response to route		Test Replay

  cypress/e2e/commands/net_stubbing.cy.ts • 3 flaky tests • 5x-driver-webkit

View Output

Test		Artifacts
network stubbing > intercepting request > can delay and throttle a StaticResponse		</td> </tr> <tr> <td colspan="2"> <a href="https://cloud.cypress.io/projects/ypt4pf/runs/58080/overview/3f7dc237-2d86-46f0-95d6-7960977b9872?reviewViewBy=FLAKY&utm_source=github&utm_medium=failed&utm_campaign=view%20test"> ... > with `resourceType` > can match a proxied image request by resourceType </a> </td> <td> </td> </tr> <tr> <td colspan="2"> <a href="https://cloud.cypress.io/projects/ypt4pf/runs/58080/overview/c36cabcf-3501-41d9-9168-8c1d2a6a7566?reviewViewBy=FLAKY&utm_source=github&utm_medium=failed&utm_campaign=view%20test"> ... > stops waiting when an xhr request is canceled </a> </td> <td> </td> </tr></table>

[jennifer-shehane]

@AtofStryker Noticed this note and don't want to forget this: https://github.com/cypress-io/cypress/blob/experimentalJIT-default/packages/server/lib/modes/run.ts#L822

// TODO: this logic to skip updating the dev-server on cancel needs a system-test before the feature goes generally available