JavaScript format Numbers-Go

1 functionNumber_format (number, decimals, Dec_point, Thousands_sep,roundtag) {2     /*3 * Parameter Description:4 * Number: Numbers to format5 * Decimals: Keep several decimals6 * dec_point: decimal symbol7 * Thousands_sep: thousand-bit symbol8 * Roundtag: Rounding parameters, default "Ceil" Fetch up, "floor" is taken down, "round" rounded9     * */TenNumber = (number + "). Replace (/[^0-9+-ee.) /g, "); OneRoundtag = Roundtag | | "Ceil";//" ceil", "Floor", "round" A     varn =!isfinite (+number)? 0: +Number , -Prec =!isfinite (+decimals)? 0: Math.Abs (decimals), -Sep = (typeofThousands_sep = = = ' undefined ')? ‘,‘: Thousands_sep, theDec = (typeofDec_point = = = ' undefined ')? ‘.‘: Dec_point, -s = ', -Tofixedfix =function(n, prec) { -   +             varK = Math.pow (10, prec); - Console.log (); +   A             return"+ parsefloat (Math[roundtag] (parsefloat ((n * k). toFixed (prec*2))). ToFixed (prec*2))/K; at         }; -s = (prec? tofixedfix (N, prec): ' + Math.Round (n)). Split ('. ')); -     varRe =/(-?\d+) (\d{3})/; -      while(Re.test (s[0])) { -S[0] = S[0].replace (Re, "$" + Sep + "$ $")); -     } in   -     if((S[1] | | "). Length <prec) { toS[1] = S[1] | | ‘‘; +S[1] + =NewArray (Prec-s[1].length + 1). Join (' 0 '); -     } the     returnS.join (DEC); * } $Console.log (Number_format (2, 2, ".", ","))//"2.00"Panax NotoginsengConsole.log (Number_format (3.7, 2, ".", ","))//"3.70" -Console.log (Number_format (3, 0, ".", ","))//"3" theConsole.log (Number_format (9.0312, 2, ".", ","))//"9.03" +Console.log (Number_format (9.00, 2, ".", ","))//"9.00" AConsole.log (Number_format (39.715001, 2, ".", ",", "floor"))//"39.71" theConsole.log (Number_format (9.7, 2, ".", ","))//"9.70" +Console.log (Number_format (39.7, 2, ".", ","))//"39.70" -Console.log (Number_format (9.70001, 2, ".", ","))//"9.71" $Console.log (Number_format (39.70001, 2, ".", ","))//"39.71" $Console.log (Number_format (9996.03, 2, ".", ","))//"9996.03" -Console.log (Number_format (1.797, 3, ".", ",", "floor"))//"1.797"

JavaScript format Numbers-Go