Chrome runtime onmessage undefined. onMessageExternal, if a different extension. In this video, we tackle a common issue faced by developers working with Chrome extensions: the "undefined" error when using `chrome. The value returned from an async onMessage listener is always received as undefined in the sender, even though Feb 6, 2024 · If sending to your extension, the runtime. Jan 31, 2018 · I have only single background script with single onMessage handler created during the initialization so there is no way it could be registered twice (but I do have a onMessageExternal handler in the same file for messages from my other add-on). onMessage event will be fired in every frame of your extension (except for the sender's frame), or runtime. Apr 15, 2016 · I am trying to create a chrome extension, but for some reasons, sometimes, the chrome. onMessage listeners with async/await are typically caused by misusing promises or sendResponse. Feb 12, 2026 · It is for chrome. onMessage, exactly as documented for Chrome 144+. You should make sure your extension can handle whether this capability is enabled or not. sroamjt ibzkx vrm wzj bgn jzbdhvk dyuok fab gylruhg jegip