formatiQ is a easy tool to format data

formatiQ(
    "{0} {name}", 
    "Hello", {name: "Lisa"}
)
> "Hello Lisa"

But I prefer extend String.prototype

formatiQ.configure({
    extendStringPrototype: true // default: false. true ~ String.prototype.format = function (data..) {...}
});

Options:

extendStringPrototype: true|false (default: false)

"{}".format(1);
> "1"

extendDatePrototype: true|false (default: false)

var d = new Date();
d.format("%Y-%0M-%0D");
> "2014-08-01"

supportMomentJS: true|false (default: false)

var d = moment();
"{:YYYY-MM-DD}".format(d);
> "2014-08-01"

You need to use this function when formatiq.js will be loaded.

Built-in format

format_spec ::= %[0][part]
part        ::= Y | y | M | D | H | h | m | s
0           ::= zero-padding

%Y  - full year: 2014
%y  - short year: 14
%M  - months: 1..12
%0M - months: 01..12
%D  - dates: 1..31
%0D - dates: 01..31
%H  - hours: 0..23
%0H - hours: 00..23
%h  - hours: 0..12
%0h - hours: 00..12
%m  - minutes: 0..59
%0m - minutes: 00..59
%s  - seconds: 0..59
%0s - seconds: 00..59

Moment JS

Html:

<script src="/vendor/moment/moment.js"></script>
<script src="/vendor/formatiq/formatiq.js"></script>
<script src="/vendor/formatiq/ext/date.moment.js"></script>

JavaScript:

formatiQ.configure({
    extendStringPrototype: true,
    extendDatePrototype: true
});

var d = new Date();
d.format("YYYY-MM-DD");
> "2014-08-01"

"{:YYYY-MM-DD}".format(d);
> "2014-08-01"

Base:

"{} {} {}".format(1, 2, 3)
> "1 2 3"

"{0} {name}".format("Hello", {name: "Lisa"})
> "Hello Lisa"

or

"{} {1.name}".format("Hello", {name: "Lisa"})
> "Hello Lisa"

"Name: {name}; City: {address.city}".format({name: "Alex", address: {city: "Paris", country: "France"}})
> "Name: Alex; City: Paris"

Functions and object methods:

var func = function () {
    return document.title;
}
"{}".format(func);
> "Home page"

var person = {
    first_name: "Alice",
    last_name: "Black",
    getFullName: function () {
        return this.first_name + " " + this.last_name;
    }
}
"{person.getFullName}".format({person: person});
> "Alice Black"

Dates:

"{0:%Y-%0M-%0D}, {0:%0D.%0M.%y}".format(new Date());
> "2014-08-01, 01.08.14"

"{:%Y-%0M-%0DT%0H:%0m:%0s}".format(new Date());
> "2014-08-01T08:01:12"

"{:%H:%0m}".format(new Date());
> "8:01"