diff --git a/.gitignore b/.gitignore
index 83e9768..7794124 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,5 @@ TAGS
 *~
 .#*
 .lib
+.idea/
+target/
\ No newline at end of file
diff --git a/build.sbt b/build.sbt
index 1230f03..7a0825d 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,5 +1,8 @@
 import ReleaseTransformations._
 
+// shadow sbt-scalajs' crossProject and CrossType until Scala.js 1.0.0 is released
+import sbtcrossproject.{crossProject, CrossType}
+
 lazy val scalac: Seq[String] = Seq(
     "-deprecation",                      // Emit warning and location for usages of deprecated APIs.
     "-encoding", "utf-8",                // Specify character encoding used by source files.
@@ -69,9 +72,9 @@ lazy val deboxSettings = Seq(
 
   resolvers += Resolver.sonatypeRepo("releases"),
   libraryDependencies ++= Seq(
-    "org.typelevel" %% "spire" % "0.14.1",
-    "org.scalatest" %% "scalatest" % "3.0.4" % "test",
-    "org.scalacheck" %% "scalacheck" % "1.13.5" % "test"
+    "org.typelevel" %%% "spire" % "0.14.1",
+    "org.scalatest" %%% "scalatest" % "3.0.4" % "test",
+    "org.scalacheck" %%% "scalacheck" % "1.13.5" % "test"
   ),
 
 
@@ -139,12 +142,16 @@ lazy val noPublishSettings = Seq(
   publishArtifact := false
 )
 
-lazy val core = project
+lazy val core = crossProject(JSPlatform, JVMPlatform)
   .in(file("."))
   .settings(moduleName := "debox")
   .settings(deboxSettings)
 
-lazy val benchmark = project.dependsOn(core)
+lazy val coreJvm = core.jvm
+lazy val coreJs = core.js
+
+lazy val benchmark = project
+  .dependsOn(coreJvm)
   .in(file("benchmark"))
   .settings(moduleName := "debox-benchmark")
   .settings(deboxSettings)
diff --git a/project/plugins.sbt b/project/plugins.sbt
index ac37d4e..a3c6aca 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -2,3 +2,6 @@ addSbtPlugin("com.jsuereth"       % "sbt-pgp"      % "1.1.0")
 addSbtPlugin("com.github.gseitz"  % "sbt-release"  % "1.0.7")
 addSbtPlugin("org.xerial.sbt"     % "sbt-sonatype" % "2.0")
 addSbtPlugin("pl.project13.scala" % "sbt-jmh"      % "0.3.2")
+addSbtPlugin("org.scala-js"       % "sbt-scalajs" % "0.6.22")
+addSbtPlugin("org.portable-scala" % "sbt-crossproject"         % "0.3.1")  // (1)
+addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "0.3.1")  // (2)
diff --git a/src/main/scala/debox/Buffer.scala b/shared/src/main/scala/debox/Buffer.scala
similarity index 100%
rename from src/main/scala/debox/Buffer.scala
rename to shared/src/main/scala/debox/Buffer.scala
diff --git a/src/main/scala/debox/Map.scala b/shared/src/main/scala/debox/Map.scala
similarity index 100%
rename from src/main/scala/debox/Map.scala
rename to shared/src/main/scala/debox/Map.scala
diff --git a/src/main/scala/debox/Set.scala b/shared/src/main/scala/debox/Set.scala
similarity index 100%
rename from src/main/scala/debox/Set.scala
rename to shared/src/main/scala/debox/Set.scala
diff --git a/src/main/scala/debox/Util.scala b/shared/src/main/scala/debox/Util.scala
similarity index 100%
rename from src/main/scala/debox/Util.scala
rename to shared/src/main/scala/debox/Util.scala
diff --git a/src/test/scala/debox/BufferCheck.scala b/shared/src/test/scala/debox/BufferCheck.scala
similarity index 100%
rename from src/test/scala/debox/BufferCheck.scala
rename to shared/src/test/scala/debox/BufferCheck.scala
diff --git a/src/test/scala/debox/MapCheck.scala b/shared/src/test/scala/debox/MapCheck.scala
similarity index 100%
rename from src/test/scala/debox/MapCheck.scala
rename to shared/src/test/scala/debox/MapCheck.scala
diff --git a/src/test/scala/debox/SetCheck.scala b/shared/src/test/scala/debox/SetCheck.scala
similarity index 100%
rename from src/test/scala/debox/SetCheck.scala
rename to shared/src/test/scala/debox/SetCheck.scala