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JAVASCRIPT Snippets.

Validate an Email Address with Regular Expression

Learn how to use a regular expression in JavaScript to effectively validate email address formats, ensuring proper syntax for user input.

Validate Strong Passwords with Regex for Mixed Characters

Implement a JavaScript regular expression to enforce strong password policies, requiring at least one uppercase, lowercase, number, and special character.

Extract Specific Query Parameter from a URL String

Learn to efficiently extract the value of a specific query parameter from a URL string using a regular expression in JavaScript, useful for frontend and backend logic.

Validate Hexadecimal Color Codes with Regular Expressions

Quickly validate CSS hexadecimal color codes (e.g., #FFF, #FFFFFF) using a simple yet effective regular expression in JavaScript for forms or styling tools.

Strip HTML Tags from a String for Plain Text Output

Learn to remove all HTML tags from a string using a regular expression in JavaScript, useful for sanitizing user input or generating plain text summaries.

Securely Processing Webhook Payloads in Node.js

Learn how to set up an Express.js endpoint to receive and securely verify webhook payloads from third-party services using HMAC signatures for integrity.

Fetching Data from GraphQL API using Apollo Client in React

Integrate a GraphQL API into a React application using Apollo Client, demonstrating how to set up the client, define queries, and display data.

Pre-rendering Data from an API with Next.js getStaticProps

Implement server-side pre-rendering with Next.js `getStaticProps` to fetch external API data at build time, improving page performance and SEO.

Securely Uploading Files to AWS S3 from a Node.js Backend

Learn to implement server-side file uploads directly to AWS S3 from a Node.js application, handling security, unique naming, and temporary access URLs.

Creating a Reusable `useToggle` Composable Function

Learn to build a simple yet powerful `useToggle` composable in Vue 3 to manage boolean state, enhancing reusability and keeping components clean.

Implementing `provide` and `inject` for Deep Dependency Injection

Master Vue 3's `provide` and `inject` to pass data down deeply nested components without prop drilling, improving component architecture and maintainability.

Centralized Error Handling with `onErrorCaptured`

Implement robust error handling in Vue 3 using the `onErrorCaptured` lifecycle hook to catch and manage errors from child components gracefully.