Answered
I have come across the following regular expression being applied to strings:
.replace(/\s+/g, " ")
What does this do?
It finds each instance of a double space (or more) in a string and replaces it with a single space.
Here's an example:
let string = " A string with many spaces. ";
string = string.replace(/\s+/g, " ");
// string = " A string with many spaces. "
Notice that any double, triple, etc. space is converted into a single space.
It replaces all double or more spaces with a single space.
You can examine the regular expression here: https://regexr.com/6llhq.
It finds any whitespace with two or more spaces and replaces it with a single space.
A breakdown:
\s
: matches any whitespace in the string.+
: quantifier that matches any whitespace greater than one spaceg
: modifier that specifies a global match. So all matches are found (not just the first).