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Announcing Scala.js 1.7.1.
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_config.yml

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### VERSIONS ###
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versions:
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scalaJS: 1.7.0
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scalaJS: 1.7.1
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scalaJSBinary: 1
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scalaJS06x: 0.6.33
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scalaJS06xBinary: 0.6
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---
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layout: post
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title: Announcing Scala.js 1.7.1
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category: news
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tags: [releases]
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permalink: /news/2021-10-07/announcing-scalajs-1.7.1/
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---
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We are pleased to announce the release of Scala.js 1.7.1!
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This is mostly a bugfix release.
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It also updates the version of the Scala standard library to 2.12.15 for 2.12.x versions.
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Read on for more details.
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<!--more-->
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## Getting started
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If you are new to Scala.js, head over to [the tutorial]({{ BASE_PATH }}/tutorial/).
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If you need help with anything related to Scala.js, you may find our community [on Gitter](https://gitter.im/scala-js/scala-js) and [on Stack Overflow](https://stackoverflow.com/questions/tagged/scala.js).
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Bug reports can be filed [on GitHub](https://github.com/scala-js/scala-js/issues).
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## Release notes
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If upgrading from Scala.js 0.6.x, make sure to read [the release notes of Scala.js 1.0.0]({{ BASE_PATH }}/news/2020/02/25/announcing-scalajs-1.0.0/) first, as they contain a host of important information, including breaking changes.
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This is a **patch** release:
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* It is backward binary compatible with all earlier versions in the 1.x series: libraries compiled with 1.0.x through 1.7.0 can be used with 1.7.1 without change.
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* It is forward binary compatible with 1.7.0: libraries compiled with 1.7.1 can be used with 1.7.0 without change.
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* It is backward source compatible with 1.7.0: source code that used to compile with 1.7.0 should compile as is when upgrading to 1.7.1.
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In addition, like Scala.js 1.7.0:
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* It is *not* forward binary compatible with 1.6.x: libraries compiled with 1.7.1 cannot be used with 1.6.x or earlier.
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* It is *not* entirely backward source compatible with 1.6.x: it is not guaranteed that a codebase will compile *as is* when upgrading from 1.6.x or earlier (in particular in the presence of `-Xfatal-warnings`).
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As a reminder, libraries compiled with 0.6.x cannot be used with Scala.js 1.x; they must be republished with 1.x first.
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## Bug fixes
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Among others, the following bugs have been fixed in 1.7.1:
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* [#4542](https://github.com/scala-js/scala-js/issues/4542) Many `dynamicImports` with `FewestModules` causes the Linker to GC itself to death
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* [#4545](https://github.com/scala-js/scala-js/issues/4545) JDK 12+ bug: Referring to non-existent class `java.lang.constant.ConstantDesc`
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* [#4548](https://github.com/scala-js/scala-js/issues/4548) Referencing only the class data of an imported native JS class causes a GCC error
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* [#4553](https://github.com/scala-js/scala-js/issues/4553) `js.native` as default arg doesn't compile for top-level method facades
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* [#4554](https://github.com/scala-js/scala-js/issues/4554) Default values for params of `@js.native def`s are actually used, instead of being replaced by `<UndefinedParam>`
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You can find the full list [on GitHub](https://github.com/scala-js/scala-js/issues?q=is%3Aissue+milestone%3Av1.7.1+is%3Aclosed).

doc/all-api.md

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## All previous versions of the API
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### Scala.js 1.7.1
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* [1.7.1 scalajs-library]({{ site.production_url }}/api/scalajs-library/1.7.1/scala/scalajs/js/index.html)
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* [1.7.1 scalajs-test-interface]({{ site.production_url }}/api/scalajs-test-interface/1.7.1/)
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* [1.7.1 scalajs-ir]({{ site.production_url }}/api/scalajs-ir/1.7.1/org/scalajs/ir/index.html)
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* [1.7.1 scalajs-linker-interface]({{ site.production_url }}/api/scalajs-linker-interface/1.7.1/org/scalajs/linker/interface/index.html) ([Scala.js version]({{ site.production_url }}/api/scalajs-linker-interface-js/1.7.1/org/scalajs/linker/interface/index.html))
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* [1.7.1 scalajs-linker]({{ site.production_url }}/api/scalajs-linker/1.7.1/org/scalajs/linker/index.html) ([Scala.js version]({{ site.production_url }}/api/scalajs-linker-js/1.7.1/org/scalajs/linker/index.html))
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* [1.7.1 scalajs-test-adapter]({{ site.production_url }}/api/scalajs-sbt-test-adapter/1.7.1/org/scalajs/testing/adapter/index.html)
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* [1.7.1 sbt-scalajs]({{ site.production_url }}/api/sbt-scalajs/1.7.1/#org.scalajs.sbtplugin.package)
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### Scala.js 1.7.0
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* [1.7.0 scalajs-library]({{ site.production_url }}/api/scalajs-library/1.7.0/scala/scalajs/js/index.html)
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* [1.7.0 scalajs-test-interface]({{ site.production_url }}/api/scalajs-test-interface/1.7.0/)

doc/internals/version-history.md

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## Version history of Scala.js
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- [1.7.1](/news/2021/10/07/announcing-scalajs-1.7.1/)
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- [1.7.0](/news/2021/08/04/announcing-scalajs-1.7.0/)
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- [1.6.0](/news/2021/06/09/announcing-scalajs-1.6.0/)
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- [1.5.1](/news/2021/04/01/announcing-scalajs-1.5.1/)

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