Regex for Validating Custom Hex Color Codes - Issues with Alpha Transparency
I'm sure I'm missing something obvious here, but This might be a silly question, but I've been struggling with this for a few days now and could really use some help... I'm trying to validate custom hex color codes that can include an alpha channel, but I'm running into issues with properly matching the format. My requirement is to accept both 3-digit and 6-digit hex codes, as well as 8-digit hex codes for transparency (e.g., `#RGB`, `#RRGGBB`, and `#RRGGBBAA`). I want to ensure that the input string is strictly adhered to, meaning any invalid characters or incorrect lengths should not pass. So far, I have implemented the following regex pattern: ```regex ^#(?:[0-9A-Fa-f]{3}|[0-9A-Fa-f]{6}|[0-9A-Fa-f]{8})$ ``` However, this regex only captures the hex codes correctly. When I try to test it with an input string like `#FF5733AA`, it works fine. But when I test it with something like `#F0F`, I encounter unexpected behavior, as my validation function erroneously considers it valid in some edge cases due to the way I’m checking against the regex. The function returns `true` for invalid inputs like `#ZZZ` or `#1234G6`. Here’s the JavaScript function I've been using for validation: ```javascript function isValidHexColor(code) { const hexColorPattern = /^#(?:[0-9A-Fa-f]{3}|[0-9A-Fa-f]{6}|[0-9A-Fa-f]{8})$/; return hexColorPattern.test(code); } console.log(isValidHexColor('#FF5733AA')); // Expected: true console.log(isValidHexColor('#F0F')); // Expected: true console.log(isValidHexColor('#ZZZ')); // Expected: false ``` The issue arises with the way the regex was set up to capture valid hex codes, but it seems to also accept partial matches or incorrect formats that I don't want. Am I missing something in my regex, or is there a different approach I should consider to handle this properly? Any guidance on this would be greatly appreciated! I'm working on a CLI tool that needs to handle this. Any help would be greatly appreciated! I recently upgraded to Javascript 3.10. What's the best practice here? I'm working in a Windows 11 environment. I'd love to hear your thoughts on this.