How would you develop a JavaScript function for text parsing to extract certain data from a string? Include your methodology and any pertinent libraries or methods.

Hard Difficulty

Hard questions require advanced understanding and critical thinking. Here, your problem-solving skills are key, as these questions often involve complex scenarios needing in-depth analysis and well-structured responses.

Javascript question

JavaScript questions test your proficiency with this versatile programming language. Demonstrate your understanding of language fundamentals, asynchronous programming, frameworks, and how you build dynamic web applications.

Here's a Hint

Discuss regular expressions, string manipulation methods, and consider edge cases like malformed input or internationalization concerns.