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Add TypeScript types for TextEncoder/TextDecoder to global type declarations #56325
Description
Hey! Both TextEncoder and TextDecoder are now natively available in Hermes:
TextEncoderlanded in Hermes for RN 0.74 (using TextEncoder with hermes facebook/hermes#948)TextDecoderlanded in Dec 2025 (Add support for TextDecoder facebook/hermes#1855), should ship with RN 0.85
But neither is declared in React Native's TypeScript globals (src/types/globals.d.ts), so TypeScript users have to either cast through any, pull in lib: ["dom"], or add their own declarations to use these APIs without type errors.
Would be great to add the type declarations now that the runtime support is there. Happy to submit a PR if that helps.
Activity
react-native-bot commentedon Apr 4, 2026
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Add TextEncoder and TextDecoder TypeScript type declarations
Add TextEncoder and TextDecoder TypeScript type declarations
Add TextEncoder and TextDecoder TypeScript type declarations
react-native-bot commentedon Apr 29, 2026
This issue is waiting for author's feedback since 24 days. Please provide the requested feedback or this will be closed in 7 days.
deyaaeldeen commentedon Apr 29, 2026
This is a request to add TS types to globals.d.ts, not a runtime bug.
Here's the TS error you get today:
react-native-bot commentedon Oct 27, 2026
This issue is stale because it has been open for 180 days with no activity. It will be closed in 7 days unless you comment on it or remove the "Stale" label.