6. Error Handling & Custom Exceptions

Try, Catch, Finally & Custom Errors

export class AutomationTimeoutError extends Error {
  constructor(message) {
    super(message);
    this.name = "AutomationTimeoutError";
  }
}
async function safeClick(action) {
  try {
    await action();
  } catch (error) {
    console.warn("Non-fatal element click failed, continuing:", error.message);
  } finally {
    console.log("Cleanup hook executed");
  }
}

Task

  • Implement safeExecuteWithFallback:
  • 1. Accept primaryAction and fallbackAction async functions.
  • 2. Try executing primaryAction(). If it throws, execute fallbackAction() and return its result.
💡Common doubts
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Lesson 6 of 35
JavaScript
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