using TextDecoder with hermes

[davidliu]

Problem

TextEncoder was recently added with 3863a36a53005dd1e6d39ea0d4ef5573bafde910 (related issue #948), but there doesn't seem to be a TextDecoder added. It seems odd that the encoder was added without the related decoder.

Solution

Add TextDecoder to hermes.

[Badbird5907]

Hi, is this planned?

[tmikov]

It is planned, but not very high priority. PRs are welcome.

[gituser8796]

hi @tmikov is there a plan to release a TextDecoder?

[mabasic]

Having this issue in react-native 0.74. Workaround is to use import 'fast-text-encoder in every layout which uses an import which deals with TextDecoder.

Is there a fix for this in the near future? I have seen the cpp code for TextEncoder and there is no way for me to contribute to this with my knowledge of cpp. I'm using Effect HttpClient which uses TextDecoder.

[aretrace]

Eagerly awaiting for TextDecoder 🧘

[gituser8796]

hi @tmikov do we know when it will be in?

[heybuild]

I'm also waiting for this :/ Does anybody know how to find out which package depends on TextDecoder? I only get this error here:

ReferenceError: Property 'TextDecoder' doesn't exist, js engine: hermes

I don't know where it comes from 🙈

[aretrace]

@heybuild You have two options to polyfill the TextDecoder API:

• https://github.com/inexorabletash/text-encoding
• https://github.com/maksimlya/react-native-fast-encoder

I've written a short guide on how to use one of them to enable streaming in React Native (Expo): 👉 https://gist.github.com/aretrace/bcb0777c2cfd2b0b1d9dcfb805fe2838

[heybuild]

@heybuild You have two options to polyfill the TextDecoder API:

• https://github.com/inexorabletash/text-encoding
• https://github.com/maksimlya/react-native-fast-encoder

I've written a short guide on how to use one of them to enable streaming in React Native (Expo): 👉 https://gist.github.com/aretrace/bcb0777c2cfd2b0b1d9dcfb805fe2838

Thank you! This did the trick:

// index.ts
import "fast-text-encoding";
import "expo-router/entry";

[andy380743909]

You have two options to polyfill the TextDecoder API:

Hi @aretrace , I have the same TextDecoder issue. When I use TextDecoder('latin1') in my ReactNative code, it causes error: Unknown encoding: latin1. I tried to polyfill using react-native-fast-encoder and fast-text-encoding in my App.ts, but it didn't work.

if (typeof global.TextEncoder === 'undefined') {
  global.TextEncoder = TextEncoder
}
if (typeof global.TextDecoder === 'undefined') {
  global.TextDecoder = TextDecoder
}

I did not use the TextDecode directly in my own code, it's a thirdparty library I dependent use TextDecode. Should I modify the thirdparty library, do the polyfill?