LWCIntermediateflowscreen-flowintegration
Integrate LWC with Flow Screen components bidirectionally
Real World Scenario
Screen Flow needs custom product configurator LWC passing complex JSON selection to next Flow element.
Expected Answer
• LWC implements FlowAttributeChangeEvent for output to Flow variables
• @api input variables from Flow declared in meta xml
• Validate outputs before dispatching FlowAttributeChangeEvent preventing Flow faults
• Flow passes recordId and mode flags as input properties
• Handle Flow navigation next/back preserving component state via @api
• Test in Flow builder preview and runtime on mobile
• Document Flow-LWC contract in integration wiki
Follow-Up Questions & Answers
Click to expand — each follow-up includes a direct, interview-ready answer
Direct answer: LWC implements FlowAttributeChangeEvent for output to Flow variables Also consider: @api input variables from Flow declared in meta xml In practice: Validate outputs before dispatching FlowAttributeChangeEvent preventing Flow faults Balance speed of delivery with maintainability.
Architect Perspective
Flow-LWC boundary is contract—version output JSON schema carefully when Flows depend on it.