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10BC0 Change all octothorpes # to _ since private # is only >=ES2022 by matux · Pull Request #1319 · rollbar/rollbar.js · GitHub
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@matux matux commented Sep 19, 2025

Description of the change

Users upgrading to v3.0.0-beta.2 encountered build failures with the following error:

SyntaxError: Class private methods are not enabled. Please add `@babel/plugin-transform-private-methods` to your configuration.

This occurred when bundlers (like Next.js, Vite, or custom Webpack configs) attempted to process our source files that contained ES2022 private class fields and methods (#privateField).

Since our SDK transpiles ES2021 into ES5 for broad compatibility, we cannot use syntax that requires additional Babel plugins that users may not have configured.

This PR replaces all private class syntax (#) with the underscore convention (_) to maintain backward compatibility while preserving the intended encapsulation pattern.

Type of change

  • Bug fix (non-breaking change that fixes an issue)
  • New feature (non-breaking change that adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to not work as expected)
  • Maintenance
  • New release

Related issues

@matux matux requested review from Copilot and waltjones September 19, 2025 22:08
@matux matux self-assigned this Sep 19, 2025
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Pull Request Overview

This PR addresses build failures users experienced when upgrading to v3.0.0-beta.2 by replacing ES2022 private class syntax (#) with underscore convention (_) for backward compatibility. The changes ensure the SDK can be processed by bundlers without requiring additional Babel plugins that users may not have configured.

  • Replaces all private class fields and methods using # syntax with underscore convention
  • Maintains the same encapsulation pattern while ensuring ES2021 compatibility
  • Fixes build errors in Next.js, Vite, and custom Webpack configurations

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File Description
src/tracing/session.js Converts #attributes private field to _attributes and updates all references
src/telemetry.js Converts private methods #getRepeatedEvent, #updateRepeatedEvent, and #lastEvent to underscore convention
src/browser/replay/replayManager.js Converts all private fields (#map, #recorder, #api, #tracing, #telemeter) to underscore convention
src/browser/replay/recorder.js Converts private fields (#options, #rrwebOptions, #stopFn, #recordFn, #events) to underscore convention

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@matux matux merged commit deb52c5 into master Sep 19, 2025
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@matux matux deleted the matux/octothorpe branch September 19, 2025 22:12
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