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instant: enable navigation validation by default #94312

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Merged
aurorascharff merged 4 commits into from
Jun 2, 2026
Merged

instant: enable navigation validation by default #94312

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6b359e8
instant: enable navigation validation by default
aurorascharff Jun 1, 2026
5e0e4af
test: update unit-test default to 'warning'
aurorascharff Jun 1, 2026
8ae3383
test: opt collateral fixtures out of 'warning' validation default
aurorascharff Jun 2, 2026
2c5387c
test: add integration test for default validationLevel ('warning')
aurorascharff Jun 2, 2026
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8 changes: 4 additions & 4 deletions packages/next/src/server/config-shared.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,7 @@ export type NextConfigComplete = Required<Omit<NextConfig, 'configFile'>> & {
prefetchInlining?: PrefetchInliningConfig
// Normalized by config.ts: defaulted to 90% of staticPageGenerationTimeout
useCacheTimeout: number
// Normalized by config.ts `finalizeConfig`: defaulted to `'manual-warning'`
// Normalized by config.ts `finalizeConfig`: defaulted to `'warning'`
instantInsights: { validationLevel: ValidationLevel }
}
// The root directory of the distDir. In development mode, this is the parent directory of `distDir`
Expand Down Expand Up @@ -1086,10 +1086,10 @@ export interface ExperimentalConfig {
/**
* Controls the validation behavior of Instant Insights
*
* - `'warning'`: Validates all navigations for Instant UI in development
* - `'manual-warning'`: Validates navigations for Instant UI in development when configured with `unstable_instant` in Pages and Layouts
* - `'warning'` (default): Validates all navigations for Instant UI in development
* - `'manual-warning'`: Validates navigations for Instant UI in development only when configured with `unstable_instant` in Pages and Layouts
* - `'experimental-error'`: Validates all navigations for Instant in development and build. Use with caution.
* - `'experimental-manual-error'`: Validates navigations for Instant UI in developement and build when configured with `unstable_instant` in Pages and Layouts. Use with caution.
* - `'experimental-manual-error'`: Validates navigations for Instant UI in development and build when configured with `unstable_instant` in Pages and Layouts. Use with caution.
*/
validationLevel?: ValidationLevel
}
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2 changes: 1 addition & 1 deletion packages/next/src/server/config.ts
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Expand Up @@ -1618,7 +1618,7 @@ function assignDefaultsAndValidate(
function finalizeConfig(config: NextConfigComplete): NextConfigComplete {
config.experimental.instantInsights = {
validationLevel:
config.experimental.instantInsights?.validationLevel ?? 'manual-warning',
config.experimental.instantInsights?.validationLevel ?? 'warning',
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}
return config
}
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