JS_Fold.re

(?x-m)^
			#   Yes *+      Open  (         Blank |Comments                                        | (No Paren | String) | String                                                        | (Nested Parens             )  )*+
			(?> \g<yesS>*+  \[    (?<yesS>  (?!.) |//.*+|/\*((?!\*/).)++(\*/|$)|(^)((?!/\*).)*(\*/)| (?<noS>[^\[\]''"/]) | (?<str> ''(\\''|[^''])*+'' | "(\\"|[^"])*+" | /(\\/|[^/])*+/) | (?<squar> \[ \g<yesS>*+ \] )  )*+
			|   \g<yesR>*+  \(    (?<yesR>  (?!.) |//.*+|/\*((?!\*/).)++(\*/|$)|(^)((?!/\*).)*(\*/)| (?<noR>[^\(\)''"/]) | \g<str>                                                       | (?<round> \( \g<yesR>*+ \) )  )*+
			|   \g<yesC>*+  \{    (?<yesC>  (?!.) |//.*+|/\*((?!\*/).)++(\*/|$)|(^)((?!/\*).)*(\*/)| (?<noC>[^\{\}''"/]) | \g<str>                                                       | (?<curly> \{ \g<yesC>*+ \} )  )*+
		)$