Q1. How does the Svelte compiler implement reactivity?
Svelte is a compiler, not a runtime framework. At build time it parses components and turns reactive statements into precise DOM update instructions. In Svelte 3 and 4, l...
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Q2. How does reactivity work in Vue 3 with Proxy?
Vue 3 wraps reactive objects in an ES Proxy that intercepts get and set operations. On a get, track() records the currently active effect (a render function, computed or ...
Q3. Why does mutating arrays or objects sometimes not update a Svelte 3/4 component?
In Svelte 3 and 4 reactivity is triggered by assignment to the variable the compiler tracks. Mutating an array or object in place does not notify the compiler because no ...
Q4. What are Angular signals and how do they change reactivity?
Signals are Angular's fine-grained reactive primitive. A signal(0) holds a value; reading it with count() registers the consumer as a dependency, and writing with count.s...
Q5. How to make router param changes as reactive?
When you navigate from one URL to other(mapped with a single component) using routes with params then the same component instance will be reused. Even though it is more e...
Q6. How do you create reactive objects?
In version 3.0 you can create a reactive object with the reactive() API. ```javascript const reactiveState = reactive({ count: 0 }) ``` In version 2.6, you can create rea...
Q7. How does reactivity works with ref?
VueJS automatically detects the changes to ref's value and updates the DOM with a dependency-tracking based reactivity system. 1. When a component is rendered for the fir...