Vim's javascript syntax file fales to highlight regex strings

Vim javascript syntax files fails

syn region  javaScriptRegexpString     start=+/[^/*]+me=e-1 skip=+\\\\\|\\/+ end=+/[gi]\{0,2\}\s*$+ end=+/[gi]\{0,2\}\s*[;.,)\]}]+me=e-1 contains=@htmlPreproc oneline


data = data.replace(/(\r\n|\n|\r)/gm, "").replace(/'/g, "\\'");