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Vue.js 3 Fundamentals with the Composition API

Computed Properties in Vue with the Composition API

Computed properties are another powerful feature from Vue that allows us to transform or perform calculations on our data and then easily reuse the result as an up-to-date variable in our template. Computed properties are very useful and should replace complex in-template expressions.

While this explanation without any code examples might not make much sense right now, it surely will after you've watched this lesson about computed properties.