LWCBeginnerlifecycleconnectedCallback
What are lifecycle hooks in LWC?
Real World Scenario
You must load data when a component appears on a tab. You explain connectedCallback.
Expected Answer
• connectedCallback runs when component inserts into DOM—common place to start data load
• renderedCallback runs after every render—avoid heavy logic here to prevent loops
• disconnectedCallback cleans timers or subscriptions when component removes
• constructor runs early—avoid DOM access or @wire side effects there
• Use lifecycle hooks instead of outdated Aura init patterns
Follow-Up Questions & Answers
Click to expand — each follow-up includes a direct, interview-ready answer
Yes for initial load. Handle errors and loading flags so template does not flash empty content awkwardly.
Architect Perspective
connectedCallback for init, renderedCallback rarely—safe beginner lifecycle guidance.