godel init foo

1 files changed, 14 insertions, 0 deletions

diff --git a/godel/js/observable.js b/godel/js/observable.js
new file mode 100644
index 0000000..1299fc6
--- /dev/null
+++ b/godel/js/observable.js
@@ -0,0 +1,14 @@
+class Observable {
+  constructor() {
+    this.observers = [];
+  }
+  subscribe(f) {
+    this.observers.push(f);
+  }
+  unsubscribe(f) {
+    this.observers = this.observers.filter((subscriber) => subscriber !== f);
+  }
+  notify(data) {
+    this.observers.forEach((observer) => observer(data));
+  }
+}