Reactive List Rendering and State
Explore how Vue.js enables reactive rendering of lists using the v-for directive and automatic DOM updates when arrays change. Understand reactive and non-reactive array methods, learn to use Vue.set for state updates, and discover the role of the key attribute in optimizing list rendering performance.
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Reactive list rendering
As we know, the template of a Vue instance binds to the data properties so that any change in data properties is automatically reflected in the DOM. Similarly, the v-for directive binds the element to the array which it renders. If an array in the data is updated, the elements based on it will reflect the changes and re-render according to the updated array.
Please run the executable application below to see the effect of updating the list on the rendered elements. In this example, a list of flowers and the list elements are rendered using the v-for directive. A ...