First commit.

react/src/PiPedalError.tsx

@@ -0,0 +1,26 @@
+
+export class PiPedalError extends Error {
+    constructor(message: string)
+    {
+        super(message);
+        this.name = "PiPedalError";
+    }
+}
+
+export class PiPedalArgumentError extends PiPedalError {
+    constructor(message: string)
+    {
+        super(message);
+        this.name = "PiPedalArgumentError";
+    }
+}
+export class PiPedalStateError extends PiPedalError {
+    constructor(message: string)
+    {
+        super(message);
+        this.name = "PiPedalStateError";
+    }
+}
+
+export default PiPedalError;
+