Screen Flow Component Validation Without Surprises
Flow screen validation is a three-method contract. Keep internal and external errors separate, render them at the right time, and never make navigation depend on accidental component state.
13 posts in this channel.
Flow screen validation is a three-method contract. Keep internal and external errors separate, render them at the right time, and never make navigation depend on accidental component state.
User mode closes important CRUD, field-security, and record-access gaps, but secure Apex still needs authorised operations, untrusted-input handling, safe errors, and reviewed privilege boundaries.
LWC communication gets easier when the mechanism matches the relationship: properties down, events up, LMS across page boundaries, and state managers across a complex component subtree.
Useful LWC tests exercise public properties, user interactions, rendered outcomes, events, and data states. Brittle tests merely describe today's private markup.
Errors become much easier to handle when LWC, Apex, and Flow agree on a small contract: stable codes for automation, safe messages for people, and correlation details for support.
LDS, GraphQL, and Apex can all put Salesforce data into an LWC. The useful question is not which one is best, but which is the smallest honest fit for the operation.
Summer '26 adds custom Lightning Web Components to normal Lightning dashboards, creating a focused escape hatch when standard report widgets are not enough.
Summer '26 gives LWC a native state layer. Use it to coordinate complex pages without coupling every reusable component to one state shape.
Summer '26 puts preview features behind Release Manager's Dev channel. Use it to learn early without making preview code a hidden production dependency.
Summer '26 makes Single Component Live Preview and the VS Code extension generally available for LWC, shortening the edit, preview and fix loop.
Summer '26 dynamic lists point to the right pattern for huge LWC datasets: render the viewport, page the data and keep 100,000 rows out of the DOM.
Complex template expressions in LWC can remove tiny bits of boilerplate, but they are best kept to simple math and checks.
GraphQL mutations in API 66.0+ let LWCs create, update and delete UI API-supported records without Apex for standard CRUD paths.