function minErr(module) {
    return function() {
        var message, i, code = arguments[0],
            prefix = "[" + (module ? module + ":" : "") + code + "] ",
            template = arguments[1],
            templateArgs = arguments,
            stringify = function(obj) {
                return "function" == typeof obj ? obj.toString().replace(/ \{[\s\S]*$/, "") : "undefined" == typeof obj ? "undefined" : "string" != typeof obj ? JSON.stringify(obj) : obj
            };
        for (message = prefix + template.replace(/\{\d+\}/g, function(match) {
                var arg, index = +match.slice(1, -1);
                return index + 2 < templateArgs.length ? (arg = templateArgs[index + 2], "function" == typeof arg ? arg.toString().replace(/ ?\{[\s\S]*$/, "") : "undefined" == typeof arg ? "undefined" : "string" != typeof arg ? toJson(arg) : arg) : match
            }), message = message + "\nhttp://errors.angularjs.org/1.2.1/" + (module ? module + "/" : "") + code, i = 2; i < arguments.length; i++) message = message + (2 == i ? "?" : "&") + "p" + (i - 2) + "=" + encodeURIComponent(stringify(arguments[i]));
        return new Error(message)
    }
}

var a = "{1}233{2}";
message = a.replace(/(\{)(\d+)(\})/g, 'wscats');//加了括号方便理解

ngMinErr = minErr("ng");
throw ngMinErr("badname","hasOwnProperty is not a valid {0} name","module");

function checkInput(x) {
    try {
        if (isNaN(parseInt(x))) {
            throw new Error("Input is not a number.");
        }
    } catch (e) {
        document.write(e.description);
        console.log(new Error("Input is not a number."));
    }
}
checkInput("not a number");