first commit

xterminal/source/base/error.ts

@@ -0,0 +1,13 @@
+export class XError extends Error {
+    constructor(message: string) {
+        message = "[x] " + message;
+        super(message);
+        this.name = "XTerminalError";
+    }
+}
+
+export const TARGET_INVALID_ERR =
+    "mount: A parent HTMLElement (target) is required";
+
+export const TARGET_NOT_CONNECTED_ERR =
+    "'mount' was called on an HTMLElement (target) that is not attached to DOM.";