Error while transforming with RN 0.64 and Typescript

Just updated to new React Native version and it's broken again.

Output:

error app/sampleFile.ts: function (prevType) {
  this.state.exprAllowed = false;

  if (prevType === types._let || prevType === types._c...<omitted>...
} could not be cloned.
Error: function (prevType) {
  this.state.exprAllowed = false;

  if (prevType === types._let || prevType === types._c...<omitted>...
} could not be cloned.
    at Object.serialize (v8.js:202:7)
    at _default (/home/sample/app/node_modules/metro-transform-worker/node_modules/@babel/core/lib/transformation/util/clone-deep.js:18:30)
    at normalizeFile (/home/sample/app/node_modules/metro-transform-worker/node_modules/@babel/core/lib/transformation/normalize-file.js:52:36)
    at normalizeFile.next (<anonymous>)
    at run (/home/sample/app/node_modules/metro-transform-worker/node_modules/@babel/core/lib/transformation/index.js:31:50)
    at run.next (<anonymous>)
    at /home/sample/app/node_modules/metro-transform-worker/node_modules/@babel/core/lib/transform-ast.js:20:41
    at Generator.next (<anonymous>)
    at evaluateSync (/home/sample/app/node_modules/gensync/index.js:251:28)

Already updated my fork appropriately and it works with updated dependencies (+ necessary code changes). PR will be created soon.

@mppperez

@mppperez is your fork available on npm?

Unfortunately not. You will have to include it manually if you want to use it. I guess with our next release we will drop this dependency as well and will check out the solution of directly use javascript-obfuscator.

We've got Hermes enabled (this should generate bytecode rather than JS) but we still have the JS files that need obfuscating... this may be already the solution even for others. I guess our configuration is just not completed yet.

I ended up publishing your fork to a private npm registry and it works well alongside Hermes. A solution using javascript-obfuscator directly would be interesting.

@mppperez

@mppperez @grit96 How did you manage to get hermes working with the obfuscator?
Either I obfuscate or I use hermes, I cannot get both to work.

More specifically, the obfuscator seems to work but then hermes recreates its own android.bundle without the obfuscation.

When I disassemble the bundle I get all the original code back. Any tips? ☹️

This is now the recommended way to do it:

// metro.config.js

module.exports = {
    transformer: {
      minifierPath: require.resolve('metro-minify-terser')
    }
}

@grit96 Thanks! I will try. One question: is it possible to plug in the javascript obfuscator there?

As an update, that still doesn't seem to minify my bundle. I am using hermes and this command to make a build:

react-native bundle --dev false --platform android --entry-file index.js --bundle-output ./android/app/src/main/assets/index.android.bundle --assets-dest ./android/app/src/main/res && rm -rf android/build/ && rm -rf android/app/build/ && rm -rf android/app/src/main/res/drawable* && mkdir -p android/app/build/intermediates/assets/release/ && cd android && ./gradlew assembleRelease && cd .."

But the index.android.bundle is still not obfuscated (I still get lots of "Original Name: xxx" which contains the original function names.)

Thoughts?
I have a feeling something is undoing the obfuscation step.

Same issue here

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Error while transforming with RN 0.64 and Typescript #43

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Error while transforming with RN 0.64 and Typescript #43

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geraintwhite commented on Jul 20, 2021

mppperez commented on Aug 12, 2021

geraintwhite commented on Aug 12, 2021

AlbertoMeQ commented on Mar 28, 2023

geraintwhite commented on Mar 29, 2023

AlbertoMeQ commented on Mar 29, 2023

AlbertoMeQ commented on Mar 29, 2023

geroale commented on Dec 23, 2024

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