...mapState SyntaxError in Vue.js, with vuex - vue.js

Question

when I'm using ...mapState in vue.js, I ran into an error when bundling files with webpack. The error is
Module build failed: SyntaxError: Unexpected token.
I've tried kinds of babel plugins such as stage-0 and transform-object-rest-spread.
Howerver, none seems to be ok for me. Would you please so kind tell me how to solve it?
the source code is
<script type="text/babel">
import { mapState } from 'vuex';
let [a, b, ...other] = [1,2,3,5,7,9]; // this line is ok
console.log(a);
console.log(b);
console.log(other);
export default{
computed:{
localComputed(){
return 10;
},
...mapState({ //this line caused the error
count: state => state.count
})
},
methods: {
increment() {
this.$store.commit('increment');
},
decrement() {
this.$store.commit('decrement');
}
}
}
</script>
and this is the webpack config fragment
{
test: /\.(js|es|es6|jsx)$/,
use: [
{
loader: 'babel-loader',
options: {
presets: [
['react'],
['es2015', {modules: false, loose: true}],
['stage-2']
],
plugins: [
['transform-runtime'],
// https://github.com/JeffreyWay/laravel-mix/issues/76
['transform-object-rest-spread'],
['transform-es2015-destructuring']
],
comments: false,
cacheDirectory: true
}
},
{
loader: 'eslint-loader',
options: {
configFile: eslintConfigPath
}
}
],
exclude: excludeReg
}

Answer 1

I had a similar problem a while ago. As far as I can see, your issue is that your babel-loader does not currently work on .vue files (which is correct as such).
The vue-loader, which handles .vue files, uses babel internally as well, but it won't use webpack's babel-loader config. The easiest way to provide a config for babel in the vue-loader is (unfortunately) creating a separate .babelrc file with your babel config in the root folder of your project:
.babelrc
{
presets: [
["react"],
["es2015", { "modules": false, "loose": true}],
["stage-2"]
],
plugins: [
["transform-runtime"],
["transform-object-rest-spread"],
["transform-es2015-destructuring"]
]
}
Note that .babelrc requires valid JSON.