Javascript replace "\\" to "\"

Question

How can I replace in my string \\ to \? For example, I want to convert RegExp('\\\\b') to RegExp('\\b'). I've tried:

 mystring.replace('\\','\'');

Possible duplicate of JavaScript backslash (\‌) in variables is causing an error — nicael
– nicael, Commented Aug 6, 2016 at 13:59
Its not duplicated, I just need to replace, is there anyway to it? — Tiago Castro
– Tiago Castro, Commented Aug 6, 2016 at 14:11

T.J. Crowder · Accepted Answer · 2016-08-06 14:01:01Z

3

If you need to replace all of the occurrences of two backslashes in a row into a single backslash, you use a regular expression with the g flag. Because backslashes are special in regular expressions, you have to escape them (with another backslash). You also have to use the return value of replace:

var str = "Here: \\\\ and here \\\\";
console.log(str);
str = str.replace(/\\\\/g, "\\");
console.log(str);

answered Aug 6, 2016 at 14:01

T.J. Crowder

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3 Comments

Nageshwar Reddy Pandem Over a year ago

can't we replace with empty string

Tiago Castro Over a year ago

It just work when I have "\\\\" if I have just 2 slashes it didnt work /:

T.J. Crowder Over a year ago

@TiagoCastro: If you have just two backslashes in a string literal, you have one backslash in the string, not two. See this answer on the question nicael pointed to.

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