diff --git a/arc-core/src/arc/audio/Music.java b/arc-core/src/arc/audio/Music.java
index 08e40e6..fbe3c4c 100644
--- a/arc-core/src/arc/audio/Music.java
+++ b/arc-core/src/arc/audio/Music.java
@@ -3,6 +3,7 @@ package arc.audio;
 import arc.*;
 import arc.Files.*;
 import arc.files.*;
+import arc.func.*;
 import arc.util.*;
 
 import java.io.*;
@@ -30,6 +31,9 @@ import static arc.audio.Soloud.*;
  * @author mzechner
  */
 public class Music extends AudioSource{
+    /** Set by the browser build: fetches the file in the background, then calls {@link #load(byte[])}. */
+    public static @Nullable Cons2<Music, Fi> webLoader;
+
     public @Nullable Fi file;
 
     int voice = -1;
@@ -65,6 +69,11 @@ public class Music extends AudioSource{
     public void load(Fi file) throws Exception{
         this.file = file;
 
+        if(webLoader != null){
+            webLoader.get(this, file);
+            return;
+        }
+
         //on iOS, try to load from internal storage instead, as that prevents unnecessary copies
         if(OS.isIos && file.type() == FileType.internal){
             try{
diff --git a/arc-core/src/arc/graphics/Mesh.java b/arc-core/src/arc/graphics/Mesh.java
index 08cbd35..e5c4ff3 100644
--- a/arc-core/src/arc/graphics/Mesh.java
+++ b/arc-core/src/arc/graphics/Mesh.java
@@ -61,7 +61,8 @@ public class Mesh implements Disposable{
         this.vertexSize = count;
         this.attributes = attributes;
 
-        if(useVertexArray && Core.gl30 == null){
+        //WebGL has no client-side vertex arrays
+        if(useVertexArray && Core.gl30 == null && !arc.util.OS.isWeb){
             vertices = new VertexArray(maxVertices, this);
             indices = new IndexArray(maxIndices);
         }else if(Core.gl30 != null){
diff --git a/arc-core/src/arc/graphics/g2d/SpriteBatch.java b/arc-core/src/arc/graphics/g2d/SpriteBatch.java
index c4fb449..dd52040 100644
--- a/arc-core/src/arc/graphics/g2d/SpriteBatch.java
+++ b/arc-core/src/arc/graphics/g2d/SpriteBatch.java
@@ -30,7 +30,7 @@ public class SpriteBatch extends Batch{
     public static long totalDrawCalls = 0;
 
     static ForkJoinHolder commonPool;
-    boolean multithreaded = !OS.isIos && !OS.isAndroid;
+    boolean multithreaded = !OS.isIos && !OS.isAndroid && !OS.isWeb;
 
     protected Mesh mesh;
     protected FloatBuffer buffer;
diff --git a/arc-core/src/arc/util/OS.java b/arc-core/src/arc/util/OS.java
index cc10572..08ee096 100644
--- a/arc-core/src/arc/util/OS.java
+++ b/arc-core/src/arc/util/OS.java
@@ -30,6 +30,8 @@ public class OS{
     public static boolean isLinux = propNoNull("os.name").contains("Linux") || propNoNull("os.name").contains("BSD");
     public static boolean isMac = propNoNull("os.name").contains("Mac");
     public static boolean isIos = false;
+    /** Compiled to JavaScript with TeaVM. */
+    public static boolean isWeb = propNoNull("os.name").equals("TeaVM");
     public static boolean isAndroid = false;
     public static boolean isARM = propNoNull("os.arch").startsWith("arm") || propNoNull("os.arch").startsWith("aarch64");
     public static boolean is64Bit = propNoNull("os.arch").contains("64") || propNoNull("os.arch").startsWith("armv8");
@@ -45,7 +47,7 @@ public class OS{
             is64Bit = false;
         }
         //if it's none of the standard operating systems, it's iOS
-        if(propNoNull("moe.platform.name").equals("iOS") || (!isAndroid && !isWindows && !isLinux && !isMac)){
+        if(propNoNull("moe.platform.name").equals("iOS") || (!isAndroid && !isWindows && !isLinux && !isMac && !isWeb)){
             isIos = true;
             isAndroid = false;
             isWindows = false;