Computed properties, which are used to derive data based on reactive state, it will provide a clean and efficient way to handle complex logic in your applications.
What are Computed Properties?
Computed properties are special properties in Vue.js that automatically update when their dependencies change. They are defined using the computed function and are cached based on their reactive dependencies.
Usage
To use computed properties in Vue.js, you import the computed function from vue and define your computed properties inside the setup function.
import { ref, computed } from 'vue';
export default {
setup() {
const firstName = ref('John');
const lastName = ref('Doe');
const fullName = computed(() => {
return `${firstName.value} ${lastName.value}`;
});
return {
firstName,
lastName,
fullName
};
}
}
In this example, fullName is a computed property that concatenates firstName and lastName. It automatically updates whenever either firstName or lastName changes.
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