javascript - Error: Support for the experimental syntax 'optionalChaining' isn't currently enabled, but

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I've followed the instructions here and here and I've added the following to my package.json

},
"babel": {
    "plugins": [
        "@babel/plugin-proposal-nullish-coalescing-operator",
        "@babel/plugin-proposal-optional-chaining"
    ]
},
"dependencies": {

But I'm still getting the error

Support for the experimental syntax 'optionalChaining' isn't currently enabled

What am I doing wrong here?

I've followed the instructions here and here and I've added the following to my package.json

},
"babel": {
    "plugins": [
        "@babel/plugin-proposal-nullish-coalescing-operator",
        "@babel/plugin-proposal-optional-chaining"
    ]
},
"dependencies": {

But I'm still getting the error

Support for the experimental syntax 'optionalChaining' isn't currently enabled

What am I doing wrong here?

• javascript
• vue.js
• vuejs2
• babeljs
• nuxt.js

Share Improve this question Follow edited Oct 2, 2019 at 19:30 Mike K asked Oct 2, 2019 at 19:16 Mike KMike K 6,5211717 gold badges7575 silver badges144144 bronze badges 6

• Maybe silly question but did you install the packages npm insall/ yarn add? – dreijntjens Commented Oct 4, 2019 at 7:51
• I have, yes lol – Mike K Commented Oct 4, 2019 at 8:00
• Are you using webpack? If so could you add the webpack.config.js? – dreijntjens Commented Oct 4, 2019 at 9:10
• Adding those plugins to my webpack config worked for me in removing that error message. I think instead of adding those plugins to the package.json, try adding it to your webpack config -- under the options key for the babel-loader rule/entry. Another possibility is adding it to your .babelrc file (if you have one in your project). – Venryx Commented Nov 26, 2019 at 11:49
• Not a direct solution since I can't know what your setup is, but: Search for any @babel/plugin-proposal- across the codebase. It may live in multiple files, sometimes twice in the same file. This has worked for me. – diogo Commented Aug 10, 2020 at 13:56

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2 Answers 2

Sorted by: Reset to default 2

Okay I am bit late here, but I can see the question is still active, for those e later:

At the time of writing, optional chaining might not work in NUXT project with node > 12, try using the current LTS version (node 12).

I think the issue might related to one or more dependencies of NUXT but we didn't investigate further, using node 12 resolves the issue for us.

I had a similar problem， I was using Vue CLI ，the reason is that the scaffolding version is too low (plugins installed separately seem to be ignored), you can check and upgrade your project scaffolding

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