diff --git a/webvr-api/webvr-api-test.ts b/webvr-api/webvr-api-test.ts
new file mode 100644
index 0000000000..df2a72438a
--- /dev/null
+++ b/webvr-api/webvr-api-test.ts
@@ -0,0 +1,62 @@
+/// <reference path="./webvr-api.d.ts" />
+
+function fieldOfViewToProjectionMatrix(fov: WebVRApi.VRFieldOfView, zNear: number, zFar: number) {
+    var upTan = Math.tan(fov.upDegrees * Math.PI/180.0);
+    var downTan = Math.tan(fov.downDegrees * Math.PI/180.0);
+    var leftTan = Math.tan(fov.leftDegrees * Math.PI/180.0);
+    var rightTan = Math.tan(fov.rightDegrees * Math.PI/180.0);
+    var xScale = 2.0 / (leftTan + rightTan);
+    var yScale = 2.0 / (upTan + downTan);
+
+    var out = new Float32Array(16);
+    out[0] = xScale;
+    out[1] = 0.0;
+    out[2] = 0.0;
+    out[3] = 0.0;
+    out[4] = 0.0;
+    out[5] = yScale;
+    out[6] = 0.0;
+    out[7] = 0.0;
+    out[8] = -((leftTan - rightTan) * xScale * 0.5);
+    out[9] = ((upTan - downTan) * yScale * 0.5);
+    out[10] = -(zNear + zFar) / (zFar - zNear);
+    out[11] = -1.0;
+    out[12] = 0.0;
+    out[13] = 0.0;
+    out[14] = -(2.0 * zFar * zNear) / (zFar - zNear);
+    out[15] = 0.0;
+
+    return out;
+}
+
+var hmd: HMDVRDevice;
+var leftEyeParams = hmd.getEyeParameters("left");
+var rightEyeParams = hmd.getEyeParameters("right");
+var leftEyeRect = leftEyeParams.renderRect;
+var rightEyeRect = rightEyeParams.renderRect;
+
+var canvas: HTMLCanvasElement;
+canvas.width = rightEyeRect.x + rightEyeRect.width;
+canvas.height = Math.max(leftEyeRect.y + leftEyeRect.height, rightEyeRect.y + rightEyeRect.height);
+
+var gHMD: WebVRApi.VRDevice;
+var gPositionSensor: WebVRApi.VRDevice;
+
+navigator.getVRDevices().then(function(devices) {
+    for (var i = 0; i < devices.length; ++i) {
+        if (devices[i] instanceof HMDVRDevice) {
+            gHMD = devices[i];
+            break;
+        }
+    }
+
+    if (gHMD) {
+        for (var i = 0; i < devices.length; ++i) {
+            if (devices[i] instanceof PositionSensorVRDevice &&
+                devices[i].hardwareUnitId == gHMD.hardwareUnitId) {
+                gPositionSensor = devices[i];
+                break;
+            }
+        }
+    }
+});