Lightning Aura Components Developer Guide

Introducing Aura Components
Quick Start
Creating Components
Using Components
Aura Component Bundle Design Resources
Use Aura Components in Lightning Experience and the Salesforce Mobile App
Navigate Across Your Apps with Page References
Get Your Aura Components Ready to Use on Lightning Pages
Use Aura Components in Experience Builder
Use Aura Components with Flows
Add Components to Apps
Integrate Your Custom Apps into the Chatter Publisher
Using Background Utility Items
Use Lightning Components in Visualforce Pages
Add Aura Components to Any App with Lightning Out (Beta)
Lightning Container
Using a Third-Party Framework
Lightning Container Component Limits
The Lightning Realty App
lightning:container NPM Module Reference
addErrorHandler()
addMessageHandler()
callApex()
removeErrorHandler()
removeMessageHandler()
sendMessage()
Communicating with Events
Communicating Across the DOM with Lightning Message Service
Creating Apps
Styling Apps
Developing Secure Code
Using JavaScript
Working with Salesforce Data
Testing Components
Debugging
Performance
Reference
PDF

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removeMessageHandler()

Unmounts the message-handling function.

Sample

When using React, it’s necessary to unmount functions to remove them from the DOM and perform necessary cleanup.

Used within a JavaScript app uploaded as a static resource and referenced by lightning:container, this example unmounts a message handling function. 
1componentWillUnmount() {
2  LCC.removeMessageHandler(this.onMessage);
3}

You can view and download this example in the Developerforce Github Repository.

Arguments

Name Type Description
handler: (userMsg: any) => void function The function that handles messages sent from the Aura component.

Response

None.