Entries in the ASCII table below code 32 are known as control characters or non-printing characters. As they are not common in JavaScript strings, using these invisible characters in regular expressions is most likely a mistake. == Noncompliant Code Example [source,javascript] ---- const pattern1 = /\x1a/; const pattern2 = new RegExp('\x1a'); ---- == Compliant Solution [source,javascript] ---- const pattern1 = /\x20/; const pattern2 = new RegExp('\x20'); ----