Declaring functions is one of the most fundamental concepts in JavaScript programming, especially when building reusable code components. As the creator of CoreUI, a widely used open-source UI library, and with over 25 years of experience in software development, I’ve written thousands of function declarations across countless projects. The most straightforward approach is using the function declaration syntax, which creates named functions that are hoisted and available throughout their scope. This method provides excellent readability and debugging capabilities compared to other function definition patterns.

Using methods is fundamental for organizing component logic in Vue applications, providing a clean way to handle events and execute reusable functions. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented thousands of Vue methods across components for form handling, data manipulation, and user interactions in enterprise applications. From my expertise, the most effective approach is to define methods in the methods option with proper naming conventions. This method provides clear component organization, automatic this binding, and excellent debugging experience.