Search for a NUL character in a string:
var patt1 = /\0/;
The marked text below shows where the expression gets a match:
Definition and Usage
The \0 metacharacter is used to find NUL character.
\0 returns the position where the NUL character was found. If no match is found, it returns -1.
The \0 metacharacter is supported in all major browsers.