Comments (3)
The LaunchDarkly JS SDK v3.0 and up uses optional chaining which is supported by modern browsers. It looks like you bundle your react app using webpack. The issue is webpack 4 uses a version of acorn which does not transpile the optional chaining operator. The solution as you can see in the react async provider example is to resolve the acorn package version that does support it. To do this, in your package.json file:
"resolutions": {
"acorn": "npm:acorn-with-stage3"
}
Webpack 5 supports optional chaining out of the box so we recommend you upgrade to that if possible. If you use other bundlers, make sure to enable/include plugins for optional chaining for your bundler.
This is also covered in our v2 to v3 migration docs. Read more here.
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Hi @yusinto thank you for your reply. We are using Webpack 5 "webpack": "^5.73.0"
and also use optional chaining in our code without issue when reverting to the LD JS SDK v2.
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This should be fixed in 3.1.1. We have removed the optional chaining operator so please update to that version if you have issues with the ?
operator.
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Related Issues (20)
- Lighthouse audit fails with `no-unload-listeners` HOT 5
- Support running in browser extension service workers HOT 19
- Consider providing ES6 builds HOT 5
- Ublock Origin blocks some LaunchDarkly URLs HOT 6
- Event streaming in iOS standalone browser HOT 12
- Experimentation docs reference a version that is unreleased HOT 1
- client already exist error HOT 2
- SDKs >= 3.0.0 no longer send click or pageview events HOT 1
- Pull only a sub set of flags for a project HOT 1
- Support passing context to the `variation` call? HOT 1
- Add opentelemetry tracing to server calls HOT 2
- Warning logged about omitting identify when client is bootstrapped HOT 4
- Unhandled Exception occurs when there is a network error HOT 5
- LD double initialisation with Strict Mode set to true.
- Bypass "do not track" setting in development environment HOT 1
- How do we retrieve the tags or custom properties using ldclient? HOT 2
- Allow to evaluate specific flags HOT 2
- option to disable logger in browser console HOT 1
- Access to XMLHttpRequest at 'https://events.launchdarkly.com/events/bulk/6374af9a71e138110cdb10cd' from origin 'https://localhost:5001' has been blocked by CORS policy: Request header field request-context is not allowed by Access-Control-Allow-Headers in preflight response. HOT 6
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