wtf is sanitize-xml-string?

This is a small utility that cleans up text before you use it in XML files. XML is a standard format for storing and exchanging data, but it has strict rules about which characters are allowed. Not all Unicode characters, including some emoji and special symbols, are valid in XML. This tool takes a messy string and removes or fixes any characters that would break an XML file. The module gives you two functions to work with: sanitize, which strips out invalid characters and returns a clean string ready for XML, and validate, which checks whether a string is already valid without changing it. Both functions follow the official XML standard rules about which characters are safe to use. Essentially, it filters out problematic characters like certain control codes and reserved Unicode blocks that XML doesn't allow. You'd use this if you're building software that generates or processes XML data and accepts user input or external strings. For example, if you're exporting database records to XML format, or accepting form submissions that need to be stored in an XML file, you'd run the strings through this sanitizer first to avoid crashes or corruption. It's especially useful when dealing with content from the web or user-generated text, which might include emoji, special symbols, or other characters that look fine in regular text but aren't technically valid in XML. One thing to note: the module relies on a relatively modern JavaScript feature (the u flag for regular expressions) to properly handle emoji and multi-character Unicode symbols. If you're running this in an older environment that doesn't support ES6, it might incorrectly flag some valid characters as invalid and remove them. For most modern projects, this isn't a concern.