webext-events

High-level events and utilities for events in Web Extensions

Install

npm install webext-events

Or download the standalone bundle to include in your manifest.json.

This package exports various utilities, just import what you need.

onContextInvalidated - Fires in content scripts when the extension is disabled, updated or reloaded.
onExtensionStart - Fires when the extension starts or is enabled. This is what yuou thought chrome.runtime.onStartup was for.
oneEvent - Creates a promise that resolves when an event is received.
addListener - Like .addEventListener but with a signal to remove the listener.