# modern-browsers
[Source code of released version](https://github.com/meteor/meteor/tree/master/packages/modern-browsers) | [Source code of development version](https://github.com/meteor/meteor/tree/devel/packages/modern-browsers)
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API for defining the boundary between modern and legacy JavaScript
clients, with runtime support for choosing between the `web.browser`
(modern) bundle architecture and `web.browser.legacy`.
