Vuex-module-decorators: Class constructor VuexModule cannot be invoked without 'new'

[abdullaev]

"Class constructor VuexModule cannot be invoked without 'new'"

The problem exists in 0.5.0 release, with 0.4.3 everything is ok

[championswimmer]

Can you show the code ?

[abdullaev]

It's example with counter from README

[jculverwell]

Just upgraded to 0.5.0 and I'm also getting this. I think a full working sample application in this repo would be extremely useful.

[bederuijter]

I'm experiencing the same issues after upgrading to 0.5.0

@Module({ namespaced: true })
export class VacationCalendarVuexModule extends VuexModule {
    ...
}

it produces the following error

Uncaught TypeError: Class constructor VuexModule cannot be invoked without 'new'
    at new VacationCalendarVuexModule (vacation-calendar.ts:78)
    at Object.stateFactory (stateFactory.js:4)
    at stateFactory (index.js:8)
    at eval (index.js:10)
    at __decorate (vacation-calendar.ts:40)
    at eval (vacation-calendar.ts:137)
    at Object../ClientApp/store/modules/vacation-calendar.ts (bootstrap:791)
    at __webpack_require__ (bootstrap:724)
    at fn (bootstrap:101)
    at eval (index.ts:7)

Inspecting the line at vacation-calendar.ts:78 for me shows this

_this = _possibleConstructorReturn(this, _getPrototypeOf(VacationCalendarVuexModule).apply(this, arguments));

specifically the .applyseems to be failing.

"@babel/core": "^7.0.0-beta.54",
"@babel/plugin-proposal-class-properties": "^7.0.0-beta.54",
"@babel/plugin-proposal-object-rest-spread": "^7.0.0-beta.54",
"@babel/plugin-transform-runtime": "^7.0.0-beta.54",
"@babel/polyfill": "^7.0.0-beta.54",
"typescript": "^3.0.3",
"vue": "^2.5.16",
"vuex": "^3.0.1",
"vuex-class": "^0.3.1",

[Yongd]

the same issue,look forward to come out a solution

[championswimmer]

most likely to work fine with v0.6.0

[championswimmer]

I think this is a very good example of how to use https://github.com/Armour/vue-typescript-admin-template

[KleinMaximus]

This error also occurs when use version 0.6.0

[Yongd]

yes, the error occurs at version 0.6.0 as the same

[championswimmer]

Can you guys show me your webpack/rollup configs ? I feel this is a es6 -> es5 transpilation level issue

[championswimmer]

v0.7.1 really totally fixes this. I finally figured out what the issue was

[KleinMaximus]

v0.8.0 - all ok
v0.9.0 - occurs this error (Class constructor VuexModule cannot be invoked without 'new')

[championswimmer]

You need to transpile this module.

The README tells how to transpile dependencies via babel. I distribute it
as ES6. If your target is ES5, you should transpile.

On Tue 30 Oct, 2018, 4:24 AM Nikolay Maksimov, [e-mail]
wrote:

v0.8.0 - all ok
v0.9.0 - occurs this error (Class constructor VuexModule cannot be invoked
without 'new')

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[ruifigueira]

I had the same issue, I even tried transpileDependencies: ['vuex-module-decorators'] but it didn't work.

I had to use 0.8.0 version instead (thanks @KleinMaximus!).

[championswimmer]

are you using Typescript only or Typescript + Babel setup ?

[ruifigueira]

Typescript + Babel (I used vue-cli for the setup).

[mastrayer]

I have same issue.
My TS transpile option is 'esnext'. and i had 0.9.0 version.
but i set transpileDependencies: ['vuex-module-decorators'], then it's works.

[championswimmer]

@ruifigueira
In that case

transpileDependencies: ['vuex-module-decorators'] 

in your vue.config.js should work

[aceven24]

I have 0.9.0 installed and I tried adding this to my vue.config.js

module.exports = {
transpileDependencies: ['vuex-module-decorators']
}

still get the error and my tsconfig looks like this:

{
"compilerOptions": {
"target": "esnext",
"module": "esnext",
"strict": true,
"jsx": "preserve",
"importHelpers": true,
"moduleResolution": "node",
"experimentalDecorators": true,
"esModuleInterop": true,
"allowSyntheticDefaultImports": true,
"sourceMap": true,
"baseUrl": ".",
"types": [
"webpack-env",
"mocha",
"chai",
"vuetify"
],
"paths": {
"@/": [
"src/"
]
},
"lib": [
"esnext",
"dom",
"dom.iterable",
"scripthost"
]
},
"include": [
"src//.ts",
"src//.tsx",
"src//.vue",
"tests//.ts",
"tests/*/.tsx"
],
"exclude": [
"node_modules"
]
}

[aceven24]

And FYI 0.8.0 works, no issues.

[KleinMaximus]

transpileDependencies: ['vuex-module-decorators'] works for me

[shishkinilya]

@championswimmer what i have to do if I dont use vue-cli and my tsconfig target is es5?

[championswimmer]

Depending on your tool you need to make sure your transpiler transpiles this module vuex-module-decorators too.

If ES5 support is not utterly essential, you can make your entire project target es2015, in which case the library will work as it is.

[aceven24]

@KleinMaximus with .90?

@championswimmer this is all I have in my vue.config.js

module.exports = {
transpileDependencies: ['vuex-module-decorators']
}

[Armour]

I also meet this problem when updating my code, add transpileDependencies: ['vuex-module-decorators'] fix it.

https://github.com/Armour/vue-typescript-admin-template now is with the latest version of vuex-module-decorators

[Dids]

@aceven24 Did you ever solve this? I just created a new TypeScript project with the latest Vue CLI yesterday, and whether or not I set transpileDependencies in my vue.config.js makes no difference.

EDIT: Never mind, it does work. Ended up being a caching issue. Do note that you'll also need babel.config.js for transpileDependencies to work.

[championswimmer]

Everyone please vote here https://github.com/championswimmer/vuex-module-decorators/issues/68

Need your opinions