sendMessage()

Sends a message from the framed JavaScript code to the Aura component.

Sample 

Used within a JavaScript app uploaded as a static resource and referenced by lightning:container, this example sends a message from the app to lightning:container.

1sendMessage() {
2  LCC.sendMessage({name: "General", value: this.state.messageToSend});
3}

Arguments 
NameTypeDescription
userMsganyWhile the data sent in the message is entirely under your control, by convention it’s an object with name and value fields.

Response 

None.

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
Use Aura and Lightning Web Components Outside of Salesforce with Lightning Out (Beta)
Lightning Container
Using a Third-Party Framework
Lightning Container Component Limits
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
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