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Show string values for configured experimental features #80686

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Merged
unstubbable merged 1 commit into from
Jun 19, 2025
Merged

Show string values for configured experimental features #80686

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6 changes: 5 additions & 1 deletion packages/next/src/server/lib/app-info-log.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -53,7 +53,11 @@ export function logStartInfo({
: bold('⨯')
: '·'

const suffix = typeof exp.value === 'number' ? `: ${exp.value}` : ''
const suffix =
typeof exp.value === 'number' || typeof exp.value === 'string'
? `: ${JSON.stringify(exp.value)}`
: ''

const reason = exp.reason ? ` (${exp.reason})` : ''

Log.bootstrap(` ${symbol} ${exp.key}${suffix}${reason}`)
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14 changes: 14 additions & 0 deletions test/integration/config-experimental-warning/test/index.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -143,6 +143,20 @@ describe('Config Experimental Warning', () => {
expect(stdout).toMatch(' · cpus: 2')
})

it('should show the configured value for string features', async () => {
configFile.write(`
module.exports = {
experimental: {
ppr: 'incremental'
}
}
`)

const stdout = await collectStdoutFromDev(appDir)
expect(stdout).toMatch(experimentalHeader)
expect(stdout).toMatch(' · ppr: "incremental"')
})

it('should show warning with config from object with experimental and multiple keys', async () => {
configFile.write(`
module.exports = {
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