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mustache.js

What could be more logical awesome than no logic at all?

Shamless port of http://github.com/defunkt/mustache by Jan Lehnardt jan@apache.org.

Thanks @defunkt for the awesome code.

Where to use?

You can use mustache.js rendering stuff in various scenarios. E.g. you can render templates in your browser, or rendering server-side stuff with node.js, use it for rendering stuff in CouchDB‘s views.

Usage

A quick example how to use mustache.js:

var view = {
  title: "Joe",
  calc: function() {
    return 2 + 4;
  }
}

var template = "{{title}} spends {{calc}}";

var html = Mustache.to_html(template, view);

template is a simple string with mustache tags and view is a JavaScript object containing the.

Template Tag Types

There are several types of tags currently implemented in mustache.js.

Simple Tags

Tags are always surrounded by mustaches like this {{foobar}}.

var view = {name: "Joe", say_hello: function(){ return "hello" }}

template = "{{say_hello}}, {{name}}"

Conditional Sections

Conditional sections begin with {{#condition}} and end with {{/condition}}. When condition evaluates to true, the section is rendered, otherwise the hole block will output nothing at all. condition may be a function returning true/false or a simple boolean.

var view = {condition: function() {
  // [...your code goes here...]
  return true;
}}

{{#condition}}
  I will be visible if condition is true
{{/condition}}

Enumerable Sections

Enumerable Sections use the same syntax as condition sections do. {{#shopping_items}} and {{/shopping_items}}. Actually the view decides how mustache.js renders the section. If the view returns an array, it will iterator over the items. Use {{.}} to access the current item inside the enumeration section.

var view = {name: "Joe's shopping card",
            items: ["bananas", "apples"]}

var template = "{{name}}: <ul> {{#items}}<li>{{.}}</li>{{/items}} </ul>"

Outputs:
Joe's shopping card: <ul><li>bananas</li><li>apples</li></ul>

View Partials

mustache.js supports a quite powerful but yet simple view partial mechanism. Use the following syntax for partials: {{<partial_name}}

var view = {name: "Joe"}
var template = "Welcome, {{jow}}! {{<winnings}}"

var winnings = {value: 1000,
                taxed_value: function() {
                  return this.value - (this.value * 0.4);
                }
               }
var winnings_template = "You just won ${{value}} (which is ${{taxed_value}} after tax)"

var output = Mustache.to_html(template, view)

output will be:
Welcome, Joe! You just won $1000 (which is $600 after tax)

You invoke a partial with {{<name}}. When name is an object, mustache.js will look for a JavaScript object called name_template and uses this for the template and name for the view. If name is a simple string, mustache.js will simply render the strings context like a normal template.

Escaping

mustache.js does escape all values when using the standard double mustache syntax. Characters which will be escaped: & \ " < >. To disable escaping, simply use tripple mustaches like {{{unescaped_variable}}}.

Example: Using {{variable}} inside a template for 5 > 2 will result in 5 > 2, where as the usage of {{{variable}}} will result in 5 > 2.

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