Pattern White Space - Yes

Yes is the designation for characters that are classified as whitespace specifically for pattern matching in regular expressions, as defined by the ECMAScript standard. These characters include the space, horizontal tab, vertical tab, line feed, carriage return, form feed, and the Unicode characters U+0085 (next line), U+200E (left-to-right mark), and U+200F (right-to-left mark). When a character holds this value, it is treated as ignorable whitespace in patterns, meaning it can appear freely between tokens without affecting the match result. This facilitates writing readable and multi-line regular expressions. Notably, this set is a subset of general whitespace, deliberately excluding characters like non-breaking space or the zero-width space, to keep pattern behavior predictable and consistent across different environments and input strings.