What are the best practices for using directives in Vue 3?

What are the best practices for using directives in Vue 3?

In Vue 3, it's important to use directives effectively to enhance your components. Some best practices include using built-in directives like v-if and v-for appropriately, creating custom directives for reusable logic, and keeping your templates clean and readable.

Can you give an example of a custom directive?

Sure! A simple custom directive could be one that changes the text color of an element. You can define it like this:

app.directive('color', {
  beforeMount(el, binding) {
    el.style.color = binding.value;
  }
});

You would use it in your template like this: <p v-color="'red'">This text will be red.</p>.

What about performance considerations?

Great question! For performance, avoid using too many directives on a single element, as it can lead to unnecessary re-renders. Also, prefer using computed properties over directives for complex logic to keep your templates clean.

How do I debug directives in Vue 3?

To debug directives, you can use Vue DevTools to inspect the component and see how directives are applied. Additionally, adding console logs within your directive's lifecycle hooks can help you track its behavior.