Error with Aurelia/Webpack

[jmdavid]

I followed the documentation, when running 'au build --env prod', I get the following error (I replaced real path with PROJECT_ROOT_FOLDER):

TypeError: Cannot read property 'has' of undefined
at has (PROJECT_ROOT_FOLDER\node_modules\javascript-obfuscator\dist\webpack:\JavaScriptObfuscator\src\decorators\Initializable.ts:81:43)

[brockme]

I'm still seeing this issue- did someone confirm it was resolved?

webpack 4.27.0
webpack-obfuscator 1.2.1
aurelia-cli 1.2.3

PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/src/decorators/Initializable.ts:45
|| initializablePropertiesSet.has(propertyName)
^
TypeError: Cannot read property 'has' of undefined
at forEach (PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/src/decorators/Initializable.ts:45:43)
at Array.forEach ()
at wrapTargetMethodsInInitializedCheck (PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/src/decorators/Initializable.ts:38:22)
at PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/src/decorators/Initializable.ts:23:9
at DecorateProperty (PROJECT_ROOT_FOLDER/node_modules/reflect-metadata/Reflect.js:553:33)
at Object.decorate (PROJECT_ROOT_FOLDER/node_modules/reflect-metadata/Reflect.js:123:24)
at __decorate (PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/src/custom-code-helpers/console-output/group/ConsoleOutputCodeHelperGroup.ts:4:92)
at Object.call (PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/src/custom-code-helpers/console-output/group/ConsoleOutputCodeHelperGroup.ts:78:1)
at r (PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/webpack/bootstrap:19:22)
at Object.call (PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/src/container/modules/custom-code-helpers/CustomCodeHelpersModule.ts:9:40)
at r (PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/webpack/bootstrap:19:22)
at Object.call (PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/src/container/InversifyContainerFacade.ts:10:35)
at r (PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/webpack/bootstrap:19:22)
at Object.call (PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/src/JavaScriptObfuscatorFacade.ts:7:36)
at r (PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/webpack/bootstrap:19:22)
at Object. (PROJECT_ROOT_FOLDER/node_modules/javascript-obfuscator/dist/webpack:/JavaScriptObfuscator/index.ts:3:38)

[sanex3339]

What node version have you used?

[brockme]

I'm using node 10.15.3

Thanks for the quick response! :)

[sanex3339]

I need a repo with a small reproducible example

[brockme]

I've recreated the bug in a new project here: https://github.com/brockme/aurelia-obfuscator-io-broken
There are a few more relevant details in the readme- but please let me know if there's anymore info I can provide!

[peitschie]

Turns out this breakage is caused by the aurelia-polyfills, which get loaded by the aurelia-cli (i.e., au build) commands.
The polyfill is only partial, and ends up confusing reflect-metadata which attempts to polyfill the remaining Reflect methods. leaving everything in a very broken state.

Most noticeable is that Reflect.defineMetadata is supplied by aurelia-polyfills, but Reflect.getMetadata is defined by reflect-metadata... meaning you can't read the value you set!

I don't have a real fix, but I can get this plugin to work if I add the line require('reflect-metadata') to the top of the imported aurelia-polyfills file.

Nasty little thing to solve though!