javascript split string by space, but ignore space in quotes (notice not to split by the colon too)

by 
s="Time:"Last 7 Days" Time:"Last 30 Days""
s.match(/(?:[^\s"]+|"[^"]*")+/g) 

// -> ['Time:"Last 7 Days"', 'Time:"Last 30 Days"']

Explained:

(?:         # non-capturing group
  [^\s"]+   # anything that's not a space or a double-quote
  |         #   or…
  "         # opening double-quote
    [^"]*   # …followed by zero or more chacacters that are not a double-quote
  "         # …closing double-quote
)+          # each match is one or more of the things described in the group

Turns out, to fix your original expression, you just need to add a + on the group:

str.match(/(".*?"|[^"\s]+)+(?=\s*|\s*$)/g)
#                         ^ here.

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