I applied online. The process took 4 weeks.

Everyone was friendly. I didn't get past the TypeScript round.

• 1 hour - FE eng leader at company: TypeScript code review, live coding exercise
• 3 hours over Zoom: continuation of TypeScript code review - FE eng leader
• 1 hour: product thinking exercise
• 45 minutes: peer interview
• 30 minutes: hiring manager

The function you provided (isNotNill) will return true if an empty string is provided, because an empty string is considered a truthy value in JavaScript and TypeScript.

isNotNullOrUndefined(v: string | null | undefined): boolean { return !!v; }

• When have you used refs in React
• Describe state management
• Describe how Redux and Hooks work and are different
• Describe how you’d use hooks with a basic todo app in React
• When should you switch from local state to global state in React (e.g. using too many useState hooks in main app)
• Does TypeScript run in the browser
• What kind of errors can TypeScript catch
• What are the disadvantages of using TypeScript