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JAVASCRIPT Snippets.

Validating Strong Passwords with Regex

Learn to validate strong passwords in JavaScript using a single regular expression, ensuring minimum length, uppercase, lowercase, numbers, and special characters for enhanced security.

Normalize Whitespace to Single Spaces

Clean up strings by replacing sequences of multiple spaces or tabs with a single space using a simple JavaScript regular expression `replace()` method, followed by trimming.

Validating Email Addresses with Regular Expressions in JavaScript

Learn to validate email addresses client-side using a robust regular expression in JavaScript, ensuring correct formatting for user input and data integrity.

Validating URLs with Regular Expressions in JavaScript

Implement robust client-side URL validation using a regular expression in JavaScript to ensure user-provided links are correctly formatted and valid for web applications.

Extracting All Hex Color Codes from a String with Regex in JavaScript

Discover how to programmatically find and extract all occurrences of hex color codes (e.g., #RRGGBB, #RGB) within a string using JavaScript regex for parsing CSS or themes.

Fetching Data from a REST API with JavaScript's Fetch API

Learn how to make a basic GET request to a REST API using the modern Fetch API in JavaScript, handle JSON responses, and catch potential errors effectively.

Making a POST Request with Bearer Token Authentication using Axios

Discover how to send data to an API using a POST request with the Axios library, including how to attach a Bearer Token for secure authentication.

Implementing Client-Side API Rate Limit Handling with Retry-After Header

Learn how to gracefully handle API rate limits on the client-side by parsing the `Retry-After` header and implementing a delayed retry mechanism.

Uploading Files to an API with JavaScript FormData

Learn how to programmatically upload files to a backend API using JavaScript's `FormData` object, suitable for forms with file inputs.

Deep Component Communication with Vue 3 provide/inject

Pass data efficiently down the component tree in Vue 3 without prop drilling using `provide` and `inject` for flexible dependency injection.

Creating a Custom Vue 3 Directive for DOM Manipulation

Extend Vue 3's capabilities by building custom directives to directly manipulate the DOM or integrate third-party libraries with specific element bindings.

Handling Asynchronous Operations in Vue 3's setup Function

Perform data fetching or other asynchronous tasks before component rendering by using an `async setup()` function in Vue 3 Composition API.