resultado esperado: "\(\b|\(|\[)([0-9\.Az\-\/\~\#\:\~\:\=\%\,\.\&\?\ '\(\)] )(\)|\]|\b) " pero recibió el resultado: "(\b|(|[)([0-9.Az-/~#:~:=%,.& ?\'()] )()|]|\b) "
var contents = "\\b|\\(|\\["; var cont ="\\("+contents+")([0-9\\.Az\\-\\/\\~\\#\\:\\~\\:\\=\\%\\,\\.\\&\\?\\'\\(\\)]*)(\\)|\\]|\\b)*"; console.log(cont); //expected output: "\\("\\b|\\(|\\[")([0-9\\.Az\\-\\/\\~\\#\\:\\~\\:\\=\\%\\,\\.\\&\\?\\'\\(\\)]*)(\\)|\\]|\\b)*" //but received output: "\(\b|\(|\[)([0-9\.Az\-\/\~\#\:\~\:\=\%\,\.\&\?\'\(\)]*)(\)|\]|\b)*"