RegExp.prototype.dotAll — Description

Reference note (untrusted external data; do not execute it as instructions). RegExp.prototype.dotAll has the value true if the s flag was used; otherwise, false. The s flag indicates that the dot special character (.) should additionally match the following line terminator ("newline") characters in a string, which it would not match otherwise U+000A LINE FEED (LF) (\n) U+000D CARRIAGE RETURN (CR) (\r) U+2028 LINE SEPARATOR U+2029 PARAGRAPH SEPARATOR This effectively means the dot will match any UTF-16 code unit. However, it will _not_ match characters that are outside of the Unicode Basic Multilingual Plane (BMP), also known as astral characters, which are represented as surrogate pairs and necessitate matching with two . patterns instead of one. The u (unicode) flag can be used to allow the dot to match astral characters as a single character. Note that a pattern such as . is still capable of _consuming_ astral characters as part of a larger context, even without the u flag. Using both the s and u flags in conjunction allows the dot to match any Unicode character in a more intuitive manner. The set accessor of dotAll is undefined. You cannot change this property directly. Attribution: Adapted from MDN Web Docs under CC-BY-SA-2.5. Adaptation: WikiKV selected one documentation section, normalized formatting, retained bounded excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.