chore!: bump TypeScript target and lib to ES2022 - #10019
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The browser targets and React Native version used by the clients that consume these packages support ES2022, so the target and lib settings can be updated to match that. We stop short of ES2023, since Hermes doesn't fully support it yet. This also lets `foundryup` drop its own `lib` override, since the base config now provides `ES2022` and `DOM` already.
Bumping the TypeScript target and lib to ES2022 changed the compiled output slightly, causing coverage to dip by a fraction of a percent in a handful of packages. Lower the affected `coverageThreshold` values in each package's `jest.config.cjs` to match.
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FrederikBolding
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Prithpal-Sooriya
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rarquevaux
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geositta
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Explanation
The base TypeScript configuration targeted
ES2020, which is older than what the browser targets and React Native version used by the clients that consume these packages actually support. Since those clients supportES2022, we can bump the sharedtargetandlibsettings toES2022to take advantage of newer syntax and APIs.We stop short of
ES2023, since Hermes (the React Native JS engine) doesn't fully support it yet (most notably,Array.prototype.toSortedis unsupported).References
N/A
Note
Medium Risk
Monorepo-wide breaking compile target affects all package consumers on older JS engines or misconfigured bundlers; behavior change is limited to emitted syntax/API surface, not application logic.
Overview
Raises the shared TypeScript
targetandlibfrom ES2020 to ES2022 intsconfig.base.json(andtsconfig.scripts.jsonfor repo scripts), so published@metamask/*packages emit and type-check against ES2022.foundryupdrops its localES2021liboverride so it follows the repo base config. Every affected package CHANGELOG documents this as a breaking consumer change: builds now ship ES2022 output and need a compatible runtime or bundler.Several Jest
coverageThresholdvalues are nudged down slightly (no functional test changes in the diff).Reviewed by Cursor Bugbot for commit 97d4dae. Bugbot is set up for automated code reviews on this repo. Configure here.