diff --git a/build.mill b/build.mill
index 33ec4d8a..98ba2ab0 100644
--- a/build.mill
+++ b/build.mill
@@ -1,6 +1,7 @@
 import mill._
 import mill.scalalib._
 import mill.scalalib.publish._
+import mill.scalajslib._
 import mill.javalib.api.JvmWorkerUtil
 
 val ScalaVersions = Seq("2.12.21", "2.13.18", "3.3.8")
@@ -19,6 +20,7 @@ object library {
     val sttp               = "4.0.26"
     val scalaTest          = "3.2.20"
     val scalaMockScalaTest = "7.5.5"
+    val scalaJS            = "1.22.0"
     val scalaLogging       = "3.9.6"
     val logback            = "1.5.38"
     val scalajHttp         = "2.4.2"
@@ -95,8 +97,7 @@ trait Bot4sTelegramModule extends CrossScalaModule {
     library.circeLiteral,
     library.catsCore,
     library.catsFree,
-    library.sttpCore,
-    library.scalaLogging
+    library.sttpCore
   )
 
   trait Tests extends ScalaTests with TestModule.ScalaTest {
@@ -158,12 +159,20 @@ object core extends Module {
     }
 
     override def mvnDeps = Task {
-      super.mvnDeps() ++ versionDependencies()
+      super.mvnDeps() ++ Seq(library.scalaLogging) ++ versionDependencies()
     }
 
     object test extends Tests
   }
 
+  object js extends Cross[CoreJsModule](ScalaVersions)
+  trait CoreJsModule extends Bot4sTelegramCrossPlatform with ScalaJSModule with Publishable {
+    override val platformSegment: String = "js"
+    override val location: String        = "core"
+
+    override def scalaJSVersion = library.Version.scalaJS
+  }
+
 }
 
 object pekko extends Module {
@@ -176,6 +185,7 @@ object pekko extends Module {
 
     override def mvnDeps = Task {
       super.mvnDeps() ++ Seq(
+        library.scalaLogging,
         library.pekkoActor,
         library.pekkoHttp,
         library.pekkoStream
diff --git a/core/src-js/com/bot4s/telegram/clients/SttpInputFile.scala b/core/src-js/com/bot4s/telegram/clients/SttpInputFile.scala
new file mode 100644
index 00000000..366d208c
--- /dev/null
+++ b/core/src-js/com/bot4s/telegram/clients/SttpInputFile.scala
@@ -0,0 +1,14 @@
+package com.bot4s.telegram.clients
+
+import com.bot4s.telegram.models.InputFile
+import sttp.client4._
+import sttp.model.Part
+
+private[clients] object SttpInputFile {
+  def multipartBodyPart(key: String, inputFile: InputFile): Option[Part[BasicBodyPart]] =
+    inputFile match {
+      // FileId is submitted through the JSON fields, see `inputFileEncoder`.
+      case InputFile.FileId(_)                    => None
+      case InputFile.Contents(filename, contents) => Some(multipart(key, contents).fileName(filename))
+    }
+}
diff --git a/core/src-js/com/bot4s/telegram/models/InputFile.scala b/core/src-js/com/bot4s/telegram/models/InputFile.scala
new file mode 100644
index 00000000..96de9e73
--- /dev/null
+++ b/core/src-js/com/bot4s/telegram/models/InputFile.scala
@@ -0,0 +1,25 @@
+package com.bot4s.telegram.models
+
+import io.circe.Encoder
+import io.circe.syntax.EncoderOps
+
+/**
+ * This object represents the contents of a file to be uploaded.
+ *
+ * Scala.js builds support file_id reuse and in-memory contents values in the model.
+ * Filesystem paths are JVM-only.
+ */
+trait InputFile
+
+object InputFile {
+  final case class FileId(fileId: String)                            extends InputFile
+  final case class Contents(filename: String, contents: Array[Byte]) extends InputFile
+
+  def apply(fileId: String): InputFile                          = FileId(fileId)
+  def apply(filename: String, contents: Array[Byte]): InputFile = Contents(filename, contents)
+
+  implicit val circeEncoder: Encoder[InputFile] = Encoder.instance {
+    case InputFile.FileId(fileId) => fileId.asJson
+    case _                        => io.circe.Json.Null
+  }
+}
diff --git a/core/src-js/com/bot4s/telegram/util/StrictLogging.scala b/core/src-js/com/bot4s/telegram/util/StrictLogging.scala
new file mode 100644
index 00000000..e06e81ae
--- /dev/null
+++ b/core/src-js/com/bot4s/telegram/util/StrictLogging.scala
@@ -0,0 +1,21 @@
+package com.bot4s.telegram.util
+
+trait StrictLogging {
+  protected lazy val logger: BotLogger = NoopBotLogger
+}
+
+trait BotLogger {
+  def trace(message: String, args: Any*): Unit
+  def debug(message: String, args: Any*): Unit
+  def info(message: String, args: Any*): Unit
+  def warn(message: String, args: Any*): Unit
+  def error(message: String, args: Any*): Unit
+}
+
+private[telegram] object NoopBotLogger extends BotLogger {
+  override def trace(message: String, args: Any*): Unit = ()
+  override def debug(message: String, args: Any*): Unit = ()
+  override def info(message: String, args: Any*): Unit  = ()
+  override def warn(message: String, args: Any*): Unit  = ()
+  override def error(message: String, args: Any*): Unit = ()
+}
diff --git a/core/src-jvm-2/com/bot4s/telegram/clients/ScalajHttpClient.scala b/core/src-jvm-2/com/bot4s/telegram/clients/ScalajHttpClient.scala
index e39da46c..7498c685 100644
--- a/core/src-jvm-2/com/bot4s/telegram/clients/ScalajHttpClient.scala
+++ b/core/src-jvm-2/com/bot4s/telegram/clients/ScalajHttpClient.scala
@@ -11,7 +11,6 @@ import com.bot4s.telegram.marshalling
 import io.circe.parser.parse
 import io.circe.{ Decoder, Encoder }
 import scalaj.http.{ Http, MultiPart }
-import com.typesafe.scalalogging.StrictLogging
 
 import scala.concurrent.{ blocking, ExecutionContext, Future }
 
@@ -29,8 +28,7 @@ import scala.concurrent.{ blocking, ExecutionContext, Future }
  */
 class ScalajHttpClient(token: String, proxy: Proxy = Proxy.NO_PROXY, telegramHost: String = "api.telegram.org")(implicit
   ec: ExecutionContext
-) extends RequestHandler[Future]
-    with StrictLogging {
+) extends RequestHandler[Future] {
 
   val connectionTimeoutMs = 10000
   val readTimeoutMs       = 50000
diff --git a/core/src-jvm/com/bot4s/telegram/clients/SttpInputFile.scala b/core/src-jvm/com/bot4s/telegram/clients/SttpInputFile.scala
new file mode 100644
index 00000000..4391780e
--- /dev/null
+++ b/core/src-jvm/com/bot4s/telegram/clients/SttpInputFile.scala
@@ -0,0 +1,15 @@
+package com.bot4s.telegram.clients
+
+import com.bot4s.telegram.models.InputFile
+import sttp.client4._
+import sttp.model.Part
+
+private[clients] object SttpInputFile {
+  def multipartBodyPart(key: String, inputFile: InputFile): Option[Part[BasicBodyPart]] =
+    inputFile match {
+      // FileId is submitted through the JSON fields, see `inputFileEncoder`.
+      case InputFile.FileId(_)                    => None
+      case InputFile.Contents(filename, contents) => Some(multipart(key, contents).fileName(filename))
+      case InputFile.Path(path)                   => Some(multipartFile(key, path))
+    }
+}
diff --git a/core/src/com/bot4s/telegram/models/InputFile.scala b/core/src-jvm/com/bot4s/telegram/models/InputFile.scala
similarity index 100%
rename from core/src/com/bot4s/telegram/models/InputFile.scala
rename to core/src-jvm/com/bot4s/telegram/models/InputFile.scala
diff --git a/core/src-jvm/com/bot4s/telegram/util/StrictLogging.scala b/core/src-jvm/com/bot4s/telegram/util/StrictLogging.scala
new file mode 100644
index 00000000..423926ed
--- /dev/null
+++ b/core/src-jvm/com/bot4s/telegram/util/StrictLogging.scala
@@ -0,0 +1,3 @@
+package com.bot4s.telegram.util
+
+trait StrictLogging extends com.typesafe.scalalogging.StrictLogging
diff --git a/core/src/com/bot4s/telegram/api/Polling.scala b/core/src/com/bot4s/telegram/api/Polling.scala
index 86e3edc6..e1ccb21a 100644
--- a/core/src/com/bot4s/telegram/api/Polling.scala
+++ b/core/src/com/bot4s/telegram/api/Polling.scala
@@ -1,7 +1,7 @@
 package com.bot4s.telegram.api
 
 import com.bot4s.telegram.methods.GetUpdates
-import com.typesafe.scalalogging.StrictLogging
+import com.bot4s.telegram.util.StrictLogging
 
 import scala.concurrent.duration.{ Duration, _ }
 import com.bot4s.telegram.models.ParsedUpdate
diff --git a/core/src/com/bot4s/telegram/api/RequestHandler.scala b/core/src/com/bot4s/telegram/api/RequestHandler.scala
index 4a65518e..c4068fd4 100644
--- a/core/src/com/bot4s/telegram/api/RequestHandler.scala
+++ b/core/src/com/bot4s/telegram/api/RequestHandler.scala
@@ -8,7 +8,7 @@ import cats.syntax.functor._
 import cats.syntax.monadError._
 import com.bot4s.telegram.methods._
 import io.circe.{ Decoder, Encoder }
-import com.typesafe.scalalogging.StrictLogging
+import com.bot4s.telegram.util.StrictLogging
 import io.circe.Decoder._
 
 import com.bot4s.telegram.marshalling._
diff --git a/core/src/com/bot4s/telegram/cats/Polling.scala b/core/src/com/bot4s/telegram/cats/Polling.scala
index c917a327..1d9118a4 100644
--- a/core/src/com/bot4s/telegram/cats/Polling.scala
+++ b/core/src/com/bot4s/telegram/cats/Polling.scala
@@ -8,7 +8,7 @@ import cats.syntax.traverse._
 import com.bot4s.telegram.api.{ Polling => BasePolling }
 import com.bot4s.telegram.methods.{ DeleteWebhook, GetMe }
 import com.bot4s.telegram.models.User
-import com.typesafe.scalalogging.StrictLogging
+import com.bot4s.telegram.util.StrictLogging
 import com.bot4s.telegram.models.ParsedUpdate
 
 case class PollingState(botUser: User, offset: Option[Long])
diff --git a/core/src/com/bot4s/telegram/clients/SttpClient.scala b/core/src/com/bot4s/telegram/clients/SttpClient.scala
index fbdfe3eb..0ff8d3bb 100644
--- a/core/src/com/bot4s/telegram/clients/SttpClient.scala
+++ b/core/src/com/bot4s/telegram/clients/SttpClient.scala
@@ -7,11 +7,8 @@ import com.bot4s.telegram.api.RequestHandler
 import com.bot4s.telegram.marshalling.CaseConversions
 import com.bot4s.telegram.methods.{ JsonRequest, MultipartRequest, Request => BotRequest, Response }
 import com.bot4s.telegram.marshalling
-import com.bot4s.telegram.models.InputFile
 import io.circe.parser.parse
 import io.circe.{ Decoder, Encoder }
-import com.typesafe.scalalogging.StrictLogging
-
 import scala.concurrent.duration._
 import sttp.client4._
 
@@ -29,8 +26,7 @@ import sttp.client4.{ Request => SttpRequest }
 class SttpClient[F[_]](token: String, telegramHost: String = "api.telegram.org")(implicit
   backend: Backend[F],
   monadError: MonadError[F, Throwable]
-) extends RequestHandler[F]()(using monadError)
-    with StrictLogging {
+) extends RequestHandler[F]()(using monadError) {
 
   val readTimeout: Duration = 50.seconds
 
@@ -54,13 +50,7 @@ class SttpClient[F[_]](token: String, telegramHost: String = "api.telegram.org")
       case r: MultipartRequest =>
         val parts = r.getFiles.flatMap { case (camelKey, inputFile) =>
           val key = CaseConversions.snakenize(camelKey)
-          inputFile match {
-            // FileId must be submitted through the JSON query, see `inputFileEncoder`
-            case InputFile.FileId(id)                   => None
-            case InputFile.Contents(filename, contents) => Some(multipart(key, contents).fileName(filename))
-            case InputFile.Path(path)                   => Some(multipartFile(key, path))
-            case other                                  => throw new RuntimeException(s"InputFile $other not supported")
-          }
+          SttpInputFile.multipartBodyPart(key, inputFile)
         }
 
         val fields = parse(marshalling.toJson(request))
diff --git a/core/src/com/bot4s/telegram/future/Polling.scala b/core/src/com/bot4s/telegram/future/Polling.scala
index 11faedd7..56e513f3 100644
--- a/core/src/com/bot4s/telegram/future/Polling.scala
+++ b/core/src/com/bot4s/telegram/future/Polling.scala
@@ -3,7 +3,7 @@ package com.bot4s.telegram.future
 import com.bot4s.telegram.api.{ Polling => BasePolling }
 import com.bot4s.telegram.methods.{ DeleteWebhook, GetMe }
 import com.bot4s.telegram.models.{ ParsedUpdate, User }
-import com.typesafe.scalalogging.StrictLogging
+import com.bot4s.telegram.util.StrictLogging
 
 import scala.concurrent.Future
 import scala.util.control.NonFatal
diff --git a/core/src/com/bot4s/telegram/marshalling/CirceDecoders.scala b/core/src/com/bot4s/telegram/marshalling/CirceDecoders.scala
index 2c3ea9ef..eb24401e 100644
--- a/core/src/com/bot4s/telegram/marshalling/CirceDecoders.scala
+++ b/core/src/com/bot4s/telegram/marshalling/CirceDecoders.scala
@@ -19,7 +19,7 @@ import com.bot4s.telegram.models.StickerFormat.StickerFormat
 import UpdateType.UpdateType
 import io.circe.Decoder
 import io.circe.generic.semiauto.deriveDecoder
-import com.typesafe.scalalogging.StrictLogging
+import com.bot4s.telegram.util.StrictLogging
 
 /**
  * Circe marshalling borrowed/inspired from [[https://github.com/nikdon/telepooz]]
diff --git a/pekko/src/com/bot4s/telegram/clients/PekkoHttpClient.scala b/pekko/src/com/bot4s/telegram/clients/PekkoHttpClient.scala
index ae2173fd..e03aec43 100644
--- a/pekko/src/com/bot4s/telegram/clients/PekkoHttpClient.scala
+++ b/pekko/src/com/bot4s/telegram/clients/PekkoHttpClient.scala
@@ -12,7 +12,6 @@ import com.bot4s.telegram.marshalling.PekkoHttpMarshalling
 import com.bot4s.telegram.marshalling._
 import com.bot4s.telegram.methods.{ Request, Response }
 import io.circe.{ Decoder, Encoder }
-import com.typesafe.scalalogging.StrictLogging
 
 import scala.concurrent.{ ExecutionContext, Future }
 
@@ -26,8 +25,7 @@ class PekkoHttpClient(token: String, telegramHost: String = "api.telegram.org")(
   system: ActorSystem,
   materializer: Materializer,
   ec: ExecutionContext
-) extends RequestHandler[Future]
-    with StrictLogging {
+) extends RequestHandler[Future] {
 
   import PekkoHttpMarshalling._
   private val apiBaseUrl = s"https://$telegramHost/bot$token/"
diff --git a/pekko/src/com/bot4s/telegram/clients/YetAnotherPekkoClient.scala b/pekko/src/com/bot4s/telegram/clients/YetAnotherPekkoClient.scala
index d3401379..6a8155fd 100644
--- a/pekko/src/com/bot4s/telegram/clients/YetAnotherPekkoClient.scala
+++ b/pekko/src/com/bot4s/telegram/clients/YetAnotherPekkoClient.scala
@@ -12,7 +12,6 @@ import cats.instances.future._
 import com.bot4s.telegram.api.RequestHandler
 import com.bot4s.telegram.methods.{ Request, Response }
 import io.circe.{ Decoder, Encoder }
-import com.typesafe.scalalogging.StrictLogging
 import com.bot4s.telegram.marshalling.responseDecoder
 
 import scala.concurrent.{ ExecutionContext, Future }
@@ -21,8 +20,7 @@ class YetAnotherPekkoClient(token: String, telegramHost: String = "api.telegram.
   system: ActorSystem,
   materializer: Materializer,
   ec: ExecutionContext
-) extends RequestHandler[Future]
-    with StrictLogging {
+) extends RequestHandler[Future] {
 
   private val flow = Http().outgoingConnectionHttps(telegramHost)