combyne

Stable: 0.3.3

No dependencies. Can be loaded as a browser global, AMD module, and Node module. Works with Browserify. Can be installed via NPM or Bower.

Getting started.

Node.

npm install combyne

Require in your source:

var combyne = require("combyne");

AMD.

// Configure the path, if necessary.
require({
  paths: {
    combyne: "path/to/combyne"
  }
});

// Use in a module.
define(["combyne"], function(combyne) {});

Browser global.

Include the latest stable in your markup:

<script src="combyne.js"></script>

Basic usage.

var tmpl = combyne("hello {{msg}}!");
tmpl.render({ msg: "world" });

// => hello world!

Features.

Combyne works by parsing your template into an AST. This provides mechanisms for intelligent compilation and optimization. The template is converted to JavaScript and invoked upon calling render with data.

Comments.

Comments are useful for ignoring anything between the open and close. They can be nested.

var tmpl = combyne("test {%-- not parsed --%}");
tmpl.render();

// => test 

Custom delimiters.

If you are not happy with the default Mustache-like syntax, you can trivially change the delimiters to suit your needs. You may only change the delimiters at a global level, because templates are compiled immediately after invoking the combyne function.

// This sets the delimiters, and applies to all templates.
combyne.options.delimiters = {
  START_PROP: "[[",
  END_PROP: "]]"
};

var tmpl = combyne("[[msg]]", { msg: "hello world" });

tmpl.render();
// => hello world

Replacing template variables.

var template = "{{foo}}";
var context = { foo: "hello" };

var tmpl = combyne(template);

var output = tmpl.render(context);
/// output == "hello"

Using filters on variables.

var template = "{{foo|reverse}}";
var context = { foo: "hello" };

var tmpl = combyne(template);

tmpl.registerFilter("reverse", function(val) {
  return val.split("").reverse().join("");
});

var output = tmpl.render(context);
/// output == "olleh"

Passing arguments to filters.

You may find that the property value is not enough information for the filter function, in which case you can send additional arguments.

var tmpl = combyne("{{ code|highlight 'javascript' }}");

tmpl.registerFilter("highlight", function(code, language) {
  // Magic highlight function that takes code and language.
  return highlight(code, language);
});

Chaining filters on variables.

var template = "{{foo|reverse|toUpper}}";
var context = { foo: "hello" };

var tmpl = combyne(template);

tmpl.registerFilter("reverse", function(val) {
  return val.split("").reverse().join("");
});

tmpl.registerFilter("toUpper", function(val) {
  return val.toUpperCase();
});

var output = tmpl.render(context);
/// output == "OLLEH"

Conditionals.

Instead of being logic-less, combyne doesn't make any assumptions and allows you to do things like if/elsif/else with simple conditionals, such as if something == somethingElse or if not something. All data types will be coerced to Strings except for Numbers.

var template = "{%if not foo%}why not?{%endif%}";
var context = { foo: false };

var tmpl = combyne(template);

var output = tmpl.render(context);
/// output == "why not?"

or a more complicated example...

var template = "{%if foo == 'hello'%}Hi!{%else%}bye...{%endif%}";
var context = { foo: "hello" };

var tmpl = combyne(template);

var output = tmpl.render(context);
/// output == "Hi!"

elsif is also supported:

var template = "{%if foo == ''%}goodbye!{%elsif foo == 'hello'%}hello!{%endif%}";
var context = { foo: "hello" };

var tmpl = combyne(template);

var output = tmpl.render(context);
/// output == "hello!"

Iterating arrays.

Also works on array-like objects: arguments and NodeList.

var template = "{%each foo%}{{.}} {%endeach%}";
var context = { foo: [1,2,3,4] };

var tmpl = combyne(template);

var output = tmpl.render(context);
/// output == "1 2 3 4 "

Change the iterated identifer within loops.

var template = "{%each arr as val%}{{val}}{%endeach%}";
var context = { arr: [1,2,3] };

var tmpl = combyne(template);

var output = tmpl.render(context);
/// output = "123"

Iterating objects.

var template = "{%each fruits as val key%}the {{key}} is {{val}}{%endeach%}";
var context = {
  fruits: {
    apple: "green"
  }
};

var tmpl = combyne(template);

var output = tmpl.render(context);
/// output == "the apple is green"

Partials.

var template = "{{foo}} {%partial bar%}";
var context = { foo: "hello" };

var tmpl = combyne(template);

tmpl.registerPartial("bar", combyne("{{name}}", {
  name: "john"
}));

var output = tmpl.render(context);
/// output == "hello john"

Unit tests.

There are many ways to run the unit tests as this library can operate in various environments.

Browser

Open test/index.html in your web browser.

Node

Run the tests inside the Node runtime and within PhantomJS:

grunt test

Continuous testing

To keep the PhantomJS tests running continuously, run:

grunt karma:daemon

The tests will automatically run whenever files change.

Code coverage

If you run the tests through Karma, a test/coverage directory will be created containing folders that correspond with the environment where the tests were run.

If you are running the defaults you should see something that looks like:

.
└── coverage
    ├── Chrome 33.0.1750 (Linux)
    └── PhantomJS 1.9.7 (Linux)

Inside PhantomJS contains the HTML output that can be opened in a browser to inspect the source coverage from running the tests.