List of all characters that should be escaped before put in to RegEx?

Take a look at PHP.JS's implementation of PHP's preg_quote function, that should do what you need:

http://phpjs.org/functions/preg_quote:491

The special regular expression characters are: . \ + * ? [ ^ ] $ ( ) { } = ! < > | : -

According to this site, the list of characters to escape is

[, the backslash \, the caret ^, the dollar sign $, the period or dot ., the vertical bar or pipe symbol |, the question mark ?, the asterisk or star *, the plus sign +, the opening round bracket ( and the closing round bracket ).

In addition to that, you need to escape characters that are interpreted by the Javascript interpreter as end of the string, that is either ' or ".

Based off of Tatu Ulmanen's answer, my solution in C# took this form:

private static List<string> RegexSpecialCharacters = new List<string>{    "\\",    ".",    "+",    "*",    "?",    "[",    "^",    "]",    "$",    "(",    ")",    "{",    "}",    "=",    "!",    "<",    ">",    "|",    ":",    "-"};foreach (var rgxSpecialChar in RegexSpecialCharacters)                rgxPattern = input.Replace(rgxSpecialChar, "\\" + rgxSpecialChar);

Note that I have switched the positions of '\' and '.', failure to process the slashes first will lead to doubling up of the '\'s

Edit

Here is a javascript translation

var regexSpecialCharacters = [    "\\", ".", "+", "*", "?",    "[", "^", "]", "$", "(",    ")", "{", "}", "=", "!",    "<", ">", "|", ":", "-"];regexSpecialCharacters.forEach(rgxSpecChar =>     input = input.replace(new RegExp("\\" + rgxSpecChar,"gm"), "\\" + rgxSpecChar))