Vue from Zero - The Framework That Lets You Mutate

How Vue actually works - reactive data that tracks its own readers, templates that re-render themselves, and single-file components - taught from the reactivity model up.

1. What Vue Actually Is Vue pairs reactive data with templates that re-render themselves when that data changes - you mutate state directly, and the framework tracks who needs to know.
2. Templates That React Vue's template syntax in one pass: {{ }} for text, : to bind attributes, @ to handle events, v-if/v-show to branch, v-for with :key to repeat, and v-model to bind forms both ways.
3. Reactivity for Real ref wraps any value in a reactive container you access via .value; reactive proxies objects in place; computed caches derived values - and destructuring is how reactivity is silently lost.
4. Components: Props, Events, and v-model defineProps takes data in, defineEmits sends events up, and v-model on a component is exactly those two wired together - one-way flow with declared exceptions.
5. Slots and Composition Slots let a component own the frame while callers own the contents; composables package reactive logic into reusable functions; provide/inject carries values past intermediate layers.
6. Watchers, Lifecycle, and Fetching watch runs code when specific data changes, onMounted marks arrival in the DOM, onUnmounted cleans up what you started - the side-effect toolkit, with computed still preferred for pure derivation.
7. When Vue Breaks The classic Vue failures - reactivity that silently stops, forgotten .value, mutated props, index keys, v-if fighting v-for - each traced back to the mechanism and calmly fixed.
8. Where to Go Next The Vue ecosystem is unusually official: Vue Router for pages, Pinia for shared state, Nuxt for the server side - each adopted when its specific pain appears, none required on day one.