Traditionally, we could only apply regular expression flags such as i (for ignoring case) to all of a regular expression. The ECMAScript feature “Regular Expression Pattern Modifiers” (by Ron Buckton) enables us to apply them to only part of a regular expression. In this blog post we examine how they work and what their use cases are. Regular expression pattern modifiers attributes reached stage 4 in October 2024 and will probably be part of ECMAScript 2025.
