Es2018 Unicode Property Escapes Not working

[shirazz]

Bug report

Describe the bug

Reproduction: codesandbox.io/s/muddy-cookies-9jr6z?file=/pages/index.js

After upgrading to V 10.0.2 the ES2018 Unicode Property Escapes feature is not working anymore. The same works perfectly till V 10.0.1 Not sure if it is due to the impact of #18759

Expected behavior

Since the upgrade is not a major one, expecting the feature to work with out any issues.

System information

• OS: macOS,
• Browser NA
• Version of Next.js: [e.g. 10.0.2]
• Version of Node.js: [e.g. 12.18.2]

[timneutkens]

Can you add a complete reproduction?

[shirazz]

@timneutkens Sorry for not including a reproduction demo. Please see it here https://codesandbox.io/s/muddy-cookies-9jr6z?file=/pages/index.js

[xxczaki]

Current workaround:

1. Install @babel/plugin-transform-unicode-regex:

$ npm install --save-dev @babel/plugin-transform-unicode-regex

2. Place it in your Babel configuration

const presets = [
	'next/babel'
];

const plugins = [
    '@babel/plugin-transform-unicode-regex'
];

module.exports = {presets, plugins};

---

Might not be the best thing to do, but at least it fixes the issue 😄

cc @shirazz @timneutkens

[shirazz]

Awesome!! Let's hope a proper fix lands on a future release. Haven't got time to check in detail

[shirazz]

Was trying this last night and got an error like below. Adding @babel/core fixed the issue as well. @timneutkens is this an ideal way to fix this issue. Does adding @bable/core make any unexpected impacts. Adding codesandbox URL's for your reference as well.

Codesandbox URL with error.
Codesandbox URL with babel core added.