Support provider.once (#1123)

* support provider.once * Fix typo
MetaMask · Oct 1, 2019 · 09f9c57 · 09f9c57
1 parent c6d13b4
commit 09f9c57
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/app/core/InpageBridge.js b/app/core/InpageBridge.js
@@ -289,6 +289,18 @@ class InpageBridge {
 		this.events[event].push(listener);
 	}
 
+	/**
+	 * Simulate the once event to keep parity with the EventEmitter interface
+	 * because there are some dapps that use it
+	 *
+	 * @param {string} event - Event name
+	 * @param {Function} listener - Callback invoked when event triggered
+	 * @returns {InpageBridge}
+	 */
+	once(event, listener) {
+		this.on(event, listener);
+	}
+
 	/**
 	 * Remove a listener for a specific event
 	 *