diff --git a/src/jsMain/kotlin/HTMLInputHelpers.kt b/src/jsMain/kotlin/HTMLInputHelpers.kt
index f6698f4..e2bb325 100644
--- a/src/jsMain/kotlin/HTMLInputHelpers.kt
+++ b/src/jsMain/kotlin/HTMLInputHelpers.kt
@@ -21,7 +21,7 @@ class ArrayOfInputsProperty(private val inputs: Array<HTMLInputElement>): ReadOn
         inputs.mapIndexed { i,input ->
             input.oninput =  {
                 cache[i] = input.valueAsNumber.toFloat()
-                null
+                null // Function is required to return a js value
             }
         }
     }
diff --git a/src/jsMain/kotlin/Main.kt b/src/jsMain/kotlin/Main.kt
index 66e1ead..248c0b6 100644
--- a/src/jsMain/kotlin/Main.kt
+++ b/src/jsMain/kotlin/Main.kt
@@ -138,11 +138,9 @@ class WebGLWrapper {
         val shininessUniform = webgl.getUniformLocation(shaderProgram, "shininess")
         webgl.uniform1f(shininessUniform, shininess.toFloat())
 
-        val pMatrix = Mat4()
-        pMatrix.perspective(PI / 3, 16.0 / 9.0, 0.1, 60.0)
+        val pMatrix = Mat4.perspective(PI / 3, 16.0 / 9.0, 0.1, 60.0)
 
-        val vMatrix = Mat4()
-        vMatrix.lookAt(Vec3(20,20,20), Vec3(0,0,0), Vec3(0,0,1))
+        val vMatrix = Mat4.lookAt(Vec3(20,20,20), Vec3(0,0,0), Vec3(0,0,1))
 
         val mMatrix = Mat4()
         mMatrix.scale(scaleFactor)
diff --git a/src/jsMain/kotlin/ObjLoader.kt b/src/jsMain/kotlin/ObjLoader.kt
index 53a4512..25be5f0 100644
--- a/src/jsMain/kotlin/ObjLoader.kt
+++ b/src/jsMain/kotlin/ObjLoader.kt
@@ -1,7 +1,6 @@
 import com.tanelso2.glmatrix.Vec3
 import org.khronos.webgl.Float32Array
 import org.khronos.webgl.Uint16Array
-import org.khronos.webgl.get
 import kotlin.random.Random
 
 class ObjLoader(source: String) {
@@ -75,7 +74,7 @@ class ObjLoader(source: String) {
     }
 
     fun getVertexNormals(): Float32Array {
-        val floatList = normals.flatMap { listOf(it.array[0], it.array[1], it.array[2]) }
+        val floatList = normals.flatMap { it.list() }
         return Float32Array(floatList.toTypedArray())
     }
 
diff --git a/src/jsMain/kotlin/ResourceLoader.kt b/src/jsMain/kotlin/ResourceLoader.kt
index 7b1b78e..e7aadfb 100644
--- a/src/jsMain/kotlin/ResourceLoader.kt
+++ b/src/jsMain/kotlin/ResourceLoader.kt
@@ -1,4 +1,5 @@
 import kotlinx.browser.window
+import org.w3c.fetch.*
 
 class ResourceLoader(vararg resourceLocations: String) {
     private class ResourceInfo {
@@ -6,11 +7,8 @@ class ResourceLoader(vararg resourceLocations: String) {
         var value: String? = null
     }
     private val resourceMap: MutableMap<String, ResourceInfo> = HashMap()
-    private var fetchParams = js("({})")
+    private val fetchParams = RequestInit(method = "GET", cache = RequestCache.NO_STORE, mode = RequestMode.SAME_ORIGIN)
     init {
-        fetchParams.method = "GET"
-        fetchParams.cache = "no-store"
-        fetchParams.mode = "same-origin"
         for (loc in resourceLocations) {
             resourceMap.put(loc, ResourceInfo())
             makeRequest(loc)
diff --git a/src/jsMain/kotlin/com/tanelso2/glmatrix/Mat4.kt b/src/jsMain/kotlin/com/tanelso2/glmatrix/Mat4.kt
index 897741c..9ad08b6 100644
--- a/src/jsMain/kotlin/com/tanelso2/glmatrix/Mat4.kt
+++ b/src/jsMain/kotlin/com/tanelso2/glmatrix/Mat4.kt
@@ -7,6 +7,19 @@ typealias Mat4JS = Float32Array
 class Mat4(val array: Mat4JS) {
     constructor() : this(Float32Array(mat4.create()))
     constructor(a: Array<Float>) : this(Float32Array(a))
+    companion object {
+        fun lookAt(eye: Vec3, center: Vec3, up: Vec3): Mat4 {
+            val ret = Mat4()
+            ret.lookAt(eye, center, up)
+            return ret
+        }
+
+        fun perspective(fovy: Number, aspect: Number, near: Number, far: Number): Mat4 {
+            val ret = Mat4()
+            ret.perspective(fovy, aspect, near, far)
+            return ret
+        }
+    }
 
     fun clone(): Mat4 = Mat4(array)
     fun identity() {
diff --git a/src/jsMain/kotlin/com/tanelso2/glmatrix/Vec3.kt b/src/jsMain/kotlin/com/tanelso2/glmatrix/Vec3.kt
index 3477504..d2adc0d 100644
--- a/src/jsMain/kotlin/com/tanelso2/glmatrix/Vec3.kt
+++ b/src/jsMain/kotlin/com/tanelso2/glmatrix/Vec3.kt
@@ -1,6 +1,7 @@
 package com.tanelso2.glmatrix
 
 import org.khronos.webgl.Float32Array
+import org.khronos.webgl.get
 
 typealias Vec3JS = Float32Array
 
@@ -27,6 +28,10 @@ class Vec3(val array: Vec3JS) {
         vec3.add(ret.array, this.array, other.array)
         return ret
     }
+
+    fun list(): List<Float> {
+        return listOf(array[0], array[1], array[2])
+    }
 }
 
 external open class vec3 {