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feat(gatsby): add partial hydration flag #36436

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merged 5 commits into from
Aug 25, 2022
Merged

feat(gatsby): add partial hydration flag #36436

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2ba3c7b
add partial hydration flag
marvinjude Aug 22, 2022
ae0ee38
delete pkjson update
marvinjude Aug 22, 2022
f096a91
adjust flag
marvinjude Aug 23, 2022
ac74ade
dry constraint check
marvinjude Aug 23, 2022
8515d66
Update packages/gatsby/src/utils/flags.ts
marvinjude Aug 23, 2022
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23 changes: 23 additions & 0 deletions packages/gatsby/src/utils/flags.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -236,4 +236,27 @@ const activeFlags: Array<IFlag> = [
},
]

if (_CFLAGS_.GATSBY_MAJOR === `5`) {
activeFlags.push({
name: `PARTIAL_HYDRATION`,
env: `GATSBY_PARTIAL_HYDRATION`,
command: `build`,
telemetryId: `PartialHydration`,
description: `Enable partial hydration to reduce Total Blocking Time and Time To Interactive `,
umbrellaIssue: `https://gatsby.dev/partial-hydration-umbrella-issue`,
experimental: true,
testFitness: (): fitnessEnum => {
const v18Constraint = {
react: `>=18.0.0`,
}
const v0Constraint = {
react: `0.0.0`,
}

return satisfiesSemvers(v18Constraint) || satisfiesSemvers(v0Constraint)
},
requires: `Requires React v18 or above.`,
})
}

export default activeFlags