:sig
String ascii_safe_name(String raw)

:params
raw : input string to normalize
return value : ASCII-safe identifier made from letters, digits, and underscores

:see
>string

:content
Builds a conservative identifier by keeping ASCII letters, digits, and underscores and dropping other characters.

This is useful when turning user- or config-provided names into handler suffixes, DOM-safe variable stems, or CSS and JS hook names.

## Related Concepts

- PHP: slug or safe-filename helpers built with `preg_replace()` and transliteration utilities
- JavaScript / Node.js: regex-based slugify or safe-name helpers used for URLs and filenames