The npm package babel-plugin-transform-es2015-duplicate-keys saw infrequent releases between February 2016 and April 2017. There have been no releases since April 2017. The package had a total of six releases across the 9.5-year period in the dataset, with version numbers including 6.6.0, 6.6.4, 6.8.0, 6.22.0 and 6.24.1.
babel-plugin-transform-es2015-duplicate-keys addresses a limitation in older JavaScript engines regarding duplicate property keys in object literals. This Babel plugin ensures that code with duplicate keys, compliant with ES2015+ semantics (last key wins), functions correctly in environments that might exhibit different behaviors. It transforms such object literals to achieve consistent and predictable results across platforms, enhancing code portability and reliability. It's useful for projects supporting older browsers.
Babel-plugin-transform-es2015-duplicate-keys npm package downloads saw fluctuating numbers. From March 2024 to August 2025 downloads were generally between 5 to 6 million with spikes above 9 million in November 2024 and June & July 2025. September 2025 shows a significant drop, likely due to incomplete monthly data.
