Javascript Regular Expression “Single Space Character”

Question

I am learning javascript and I am analyzing existing codes.

In my JS reference book, it says to search on a single space use " \\s "?

But I have came across the code

obj.match(/Kobe Bryant/);

Instead of using \\s , it uses the actual space?

Why doesn't this generate an error?

Answer 1

The character class \\s does not just contain the space character but also other Unicode white space characters . \\s is equivalent to this character class:

[\t\n\v\f\r \u00a0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000]

Answer 2

No. It is perfectly legal to include a literal space in a regex.

However, it's not equivalent - \\s will include any whitespace character, including tabs, non-breaking spaces, half-width spaces and other characters, whereas a literal space will only match the regular space character.

Answer 3

\\s matches any whitespace character, including tabs etc. Sure you can use a literal space also without problems. Just like you can use [0-9] instead of \\d to denote any digit.

Answer 4

In addition to normal spaces, \\s matches different kinds of white space characters, including tabs (and possibly newline characters, according to configuration). That said, matching with a normal space is certainly valid, especially in your case where it seems you want to match a name, which is normally separated by a normal space.