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JAVASCRIPT Snippets.

Extract All Links (`href`) from HTML Anchor Tags

Discover how to efficiently extract all URL links from `<a>` tags within an HTML string using a simple yet powerful regular expression in JavaScript.

Validate CSS Hex Color Codes

Quickly validate common CSS hexadecimal color formats (e.g., #FFF, #FFFFFF, FFF, FFFFFF) with a concise regular expression for UI development.

Remove C-style Multi-line Comments

Learn to strip multi-line `/* ... */` comments from code or configuration files using a regular expression, useful for minification or processing.

Normalize Multiple Newlines to Single

Clean up text content by replacing multiple consecutive newline characters with a single newline, improving readability and data consistency.

Extract All Numbers (Integers & Decimals) from a String

Learn how to use regular expressions in JavaScript to efficiently extract all numeric values, including integers and floating-point numbers, from any given string for data processing.

Normalize Whitespace: Replace Multiple Spaces with Single

Discover how to clean up text strings in JavaScript by using a regex to replace any sequence of multiple whitespace characters (spaces, tabs, newlines) with a single space.

Mask Sensitive Data (e.g., Credit Card Numbers) for Display

Learn to securely mask sensitive information like credit card numbers in a string using regular expressions, displaying only the last few digits for privacy and security.

Extract Placeholders (e.g., {{key}}) from Template Strings

Learn how to parse template strings using regular expressions to extract dynamic placeholders, like `{{variable_name}}`, for processing in web applications or UI rendering.

Capitalize First Letter of Each Word (Title Case)

Apply title case to any string in JavaScript by using a regular expression to efficiently capitalize the first letter of every word, useful for names and headlines.

Validate Email Addresses with Regular Expressions

Learn to validate common email address formats using a robust regular expression in JavaScript, essential for web form input validation.

Extract Specific Query Parameters from a URL

Discover how to use regular expressions in JavaScript to efficiently extract individual query parameters and their values from a URL string.

Validate and Format US Phone Numbers with Regex

Learn to validate common 10-digit US phone number formats and extract its components using regular expressions in JavaScript.