javascript - JS string split using regex confusion -

hi trying split string using regex results different expect.

var text = 'p$blank$a$blank$l$blank$a$blank$c$blank$e$blank$'; > text.split(/(\$blank\$).\1/g); ["p", "$blank$", "l", "$blank$", "c", "$blank$", ""] 

what want

["p", "$blank$a$blank$",l, "$blank$a$blank$", "c", "$blank$e$blank$"] 

this the docs suggest:

if separator regular expression contains capturing parentheses, each time separator matched, results (including undefined results) of capturing parentheses spliced output array.

the capturing parentheses include first $blank$, that's gets included in array.

if want whole split string included, you'll need:

text.split(/(\$blank\$.\$blank\$)/) 

["p", "$blank$a$blank$", "l", "$blank$a$blank$", "c", "$blank$e$blank$", ""]

the empty string @ end expected behavior when split() finds delimiter @ end of string.