Freaks City

Enviroment Setup Vue 3 requires Node.js for development. Install the Vue CLI globally: npm install -g @vue/cli vue --version # Verify version (≥4.5.0) vue create project-name # Select "Manually select features" during setup Composition API Fundamentals Reactive State Management ref() for Primitive Values <template> <div&g ...

Vue 3 introduces distinct concepts of ref for reactivity and template refs for accessing DOM elements or component instances. ref: Reactive References ref creates reactive data references in Composition API. Basic Usage import { ref } from 'vue' const counter = ref(0) console.log(counter.value) // Output: 0 counter.value++ console.log(counter ...

Core Improvements in Vue 3 Performance Enhancements: Virtual DOM rewritten with static node skipping and dynamic node-only processing. Update performence improved by 1.3-2x, and SSR speed increased 2-3x. Tree-shaking Support: Removes unused modules during build. Based on static analysis of ES6 imports to identify and eliminate unused code. Fra ...

Basic Watch Usage For a list page that requires automatic search when users input keywords, you can use watch to monitor search value changes instead of relying solely on input change events. <template> <div> <div class="search-container"> <label>Search</label> <input v-model="qu ...

To install Vue CLI globally: npm install -g @vue/cli npm install -g @vue/cli-init Creating a new project: vue create project-name cd project-name npm run serve Template Fundamentals Basic template syntax includes: Text interpolation: {{ variable }} v-once: One-time rendering v-html: HTML rendering v-bind: Attribute binding (shorthand ':') Co ...

Object.defineProperty can indeed observe array elements. For example, you can iterate over an array and define getter/setter for each index: let array = [1, 2, 3, 4, 5]; array.forEach((item, index) => { defineReactive(array, index, item); }); function defineReactive(obj, key, val) { Object.defineProperty(obj, key, { enumerab ...

Vue 3’s watch API lets you run arbitrary code whenever a reactive value changes. Its the reactive system’s hook for side-effects—loggging, validation, network requests, or synchronizing related state. Listening to a single ref <template> <p>Counter: {{ count }}</p> <button @click="count++">Increment</but ...

Reactive References in Vue 3 When working with reactive data in Vue 3's Composition API, the ref() function creates a reactive object containing a .value property. This wrapper object can hold any data type and is initially set to undefined. These reactive references can be directly used in templates through interpolation. A common pattern invo ...

const reactiveData = { name: 'alice', age: 30 }; const handler = { get(target, key) { console.log(`Accessing property: ${key}`); return Reflect.get(target, key); }, set(target, key, value) { console.log(`Setting ${key} to ${value}`); return Reflect.set(target, key, value); }, deleteProperty(target, key) { cons ...

Data Proxy and Data Hijacking Understanding Vue's reactivity system requires examining two key concepts: data proxy and data hijacking. Data proxy involves creating processed copies of properties defined in the data option. When accessing vm._data, you interact with getter and setter methods for each property. When a property changes, the sette ...