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JAVASCRIPT Snippets.

HTML Escaping for XSS Prevention in JavaScript

Discover how to effectively escape user-supplied strings before rendering them in HTML to prevent Cross-Site Scripting (XSS) vulnerabilities in modern web applications.

Implementing a Strong Content Security Policy (CSP)

Protect your web application from XSS and data injection by configuring a robust Content Security Policy (CSP) HTTP header using Helmet in an Express.js application.

Efficient Computed Properties with Getters/Setters in Vue 3

Learn to create powerful Vue 3 computed properties with both a getter and a setter, enabling two-way data binding and derived state manipulation effectively.

Using Deep and Immediate Watchers in Vue 3

Master Vue 3 watchers by leveraging `deep` and `immediate` options to observe changes in nested object properties and execute callbacks on initial component render.

Creating a Reusable Mouse Tracking Composable in Vue 3

Build a custom Vue 3 composable to encapsulate and reuse mouse position tracking logic across multiple components, enhancing modularity and code reuse.

Managing Event Listeners with Vue 3 Lifecycle Hooks

Use `onMounted` to add and `onBeforeUnmount` to clean up event listeners in Vue 3 components, preventing memory leaks and ensuring proper resource management.

Batch Update Styles and Attributes of Multiple Elements

Discover how to select multiple DOM elements using `querySelectorAll` and efficiently apply consistent style changes or update specific attributes using JavaScript loops.

Swap Position of Two Sibling DOM Elements

Learn to programmatically change the order of two direct sibling elements within their parent container using JavaScript's `insertBefore` method and conditional logic.

Vue 3 Composition API with script setup

Learn to use Vue 3's Composition API with `script setup` for reactive state (`ref`), computed properties, watchers, and lifecycle hooks (`onMounted`) in a concise way.

Vue 3 Component Communication: Props, Emits, and Slots

Master passing data with `defineProps`, emitting events with `defineEmits`, and rendering dynamic content using slots for robust Vue 3 component communication.

Global State Management with Vue 3 Provide/Inject

Implement simple global state management in Vue 3 using the Composition API's `provide` and `inject` functions for sharing reactive data across components without props drilling.

Dynamic Components and KeepAlive in Vue 3

Dynamically switch between Vue 3 components using `<component :is="..." />` and optimize performance by preserving component state with `<KeepAlive>`.