Developer Willow Jr shares valuable insights on building a calculator app using Vue.js. The project taught key lessons in handling user input, displaying dynamic results, and performing calculations with JavaScript. Key takeaways include using Vue's reactive properties for real-time updates, implementing checks to prevent consecutive operators, and leveraging Bootstrap for responsive design.

Source: https://dev.to/willowjr/what-ive-learned-from-building-a-calculator-with-vuejs-3cj7