Add multiple consecutive whitespaces in a string replace operation

Question

g.e. I would like to prepend all occurrences of the string "foo" with three spaces:

value.replace(/(foo)/, "   " + "$1")
value.replace(/(foo)/, "   $1")
value.replace(/(foo)/, " " + " " + " $1")

all return

 foo

instead of

   foo

Answer 1

Did you try the follow GREL expression value.replace('foo', ' foo') ?