Synopsis

Transparency is a client-side template engine which binds data to DOM. Just call .render(data).

``html



`

`js
var hello = {
greeting: 'Hello',
name: 'world!'
};

$('#template').render(hello);
`

`html



`


Features

* Semantic data binding - No need for <%=foo%> or {{foo}} assignments
* Collection rendering - No need for hand-written loops
* Valid HTML templates - Write templates as a part of the HTML, in plain HTML
* View logic in JavaScript - No crippled micro-template language, just plain JavaScript functions

Transparency is compatible with IE9+, Chrome, Firefox, iOS, Android and other mobile browsers. Support for IE8 requires jQuery.

Community

* IRC: freenode/#transparency.js
* Google Groups: transparencyjs@googlegroups.com

We are looking for new maintainers. Anyone with an accepted pull request will get commit rights. Current maintainers are

* pyykkis
* rikukissa




Fiddle

Try Transparency with interactive examples.

Install

`
curl https://raw.github.com/leonidas/transparency/master/dist/transparency.min.js

Or with Bower


npm install -g bower
bower install transparency
`

#### Require with script tags

`html


`

#### or with AMD

`javascript
require(['jquery', 'transparency'], function($, Transparency) {

// Without jQuery
Transparency.render(document.getElementById('template'), data);

// With jQuery
jQuery.fn.render = Transparency.jQueryPlugin;
$('#template').render(data);
});
`

#### Node.js

npm install transparency

For server-side use, see
examples/hello-server.

API documentation

Here are short and detailed examples how to use Transparency. For more elaborate examples, see
User manual and
FAQ.
Feel free to add your own examples in the wiki, too!

Implementation details are explained in the
annotated source code.

$3

Transparency binds values in-place. That means, you don't need to write separate template sections on your page.
Instead, compose just a normal, static html page and start binding some dynamic values on it!

By default, Transparency binds JavaScript objects to a DOM element by id, class,name attribute and
data-bind attribute. Default behavior can be changed by providing a custom matcher function, as explained in section
Configuration. Values are escaped before rendering.

Template:

`html



`

Javascript:

`js
var hello = {
hello: 'Hello',
goodbye: 'Goodbye!',
greeting: 'Howdy!',
'hi-label': 'Terve!' // Finnish i18n
};

// with jQuery
$('#container').render(hello);

// ..or without
Transparency.render(document.getElementById('container'), hello);
`

Result:

`html



`

$3

Template:

`html



`

Javascript:

`js
var activities = [
{activity: 'Jogging'},
{activity: 'Gym'},
{activity: 'Sky Diving'},
];

$('#activities').render(activities);

// or
Transparency.render(document.getElementById('activities'), activities);
`

Result:

`html


• Jogging


• Gym


• Sky Diving


`

#### Rendering a list of plain values

With plain values, Transparency can't guess how you would like to bind the data to DOM, so a bit of
help is needed. Directives are just for that.

Access to the plain values within the directives is provided through this.value. There's a whole
lot more to say about the directives, but that's all we need for now. For the details, see
section Directives.

Template:

`html



`

Javascript:

`js
var comments, directives;

comments = ["That rules", "Great post!"];

// See section 'Directives' for the details
directives = {
comment: {
text: function() {
return this.value;
}
}
};

$('.comments').render(comments, directives);
`

Result:

`html



`

$3

Template:

`html



`

Javascript:

`js
var post = {
title: 'Hello World',
post: 'Hi there it is me',
comments: [ {
name: 'John',
text: 'That rules'
}, {
name: 'Arnold',
text: 'Great post!'
}
]
};

$('.container').render(post);
`

Result:

`html



`

$3

Template:

`html



`

Javascript:

`js
var person = {
firstname: 'John',
lastname: 'Wayne',
address: {
street: '4th Street',
city: 'San Francisco',
zip: '94199'
}
};

$('.person').render(person);
`

Result:

`html



`

$3

Directives are actions Transparency performs while rendering the templates. They can be used for setting element
text or html content and attribute values, e.g., class, src or href.

Directives are plain javascript functions defined in a two-dimensional object literal, i.e.,

directives[element][attribute] = function(params) {...}

where element is value of id, class, name attribute or data-bind attribute of the target element. Similarly,
attribute is the name of the target attribute.

When a directive function is executed, this is bound to the current model object. In addition, the directive function
receives current element as params.element, current index as params.index and current value as params.value.

The return value of a directive function is assigned to the matching element attribute. The return value should be
string, number or date.

Template:

`html



`

Javascript:

`js
var person, directives;

person = {
firstname: 'Jasmine',
lastname: 'Taylor',
email: 'jasmine.tailor@example.com'
};

directives = {
name: {
text: function(params) {
return params.value + this.firstname + " " + this.lastname;
}
},

email: {
href: function(params) {
return "mailto:" + this.email;
}
}
};

$('.person').render(person, directives);
`

Result:

`html



`

$3

Template:

`html



`

Javascript:

`js
person = {
firstname: 'Jasmine',
lastname: 'Taylor',
email: 'jasmine.taylor@example.com',
friends: [ {
firstname: 'John',
lastname: 'Mayer',
email: 'john.mayer@example.com'
}, {
firstname: 'Damien',
lastname: 'Rice',
email: 'damien.rice@example.com'
}
]
};

nameDecorator = function() { "" + this.firstname + " " + this.lastname + ""; };

directives = {
name: { html: nameDecorator },

friends: {
name: { html: nameDecorator }
}
};

$('.person').render(person, directives);
`

Result:

`html



`

Configuration

Transparency can be configured to use custom matcher for binding the values to DOM elements.

For example, one might want to bind only with data-bind attribute, but not with class or id attributes.
Custom matcher function should take key and element as parameters and return true if the
corresponding value should be bind to the given DOM element.

`javascript
// The custom matcher gets Transparency Element wrapper with following properties
// element.el: Raw DOM element
// element.name: Lower-cased name of the DOM element, e.g., 'input'
// element.classNames: List of class names of the DOM element, e.g., ['person', 'selected']
Transparency.matcher = function(element, key) {
return element.el.getAttribute('data-bind') == key;
};

// Values are bind only with 'data-bind' attribute
template.render({name: "Will Smith"});
`

Debugging templates, data and Transparency

http://leonidas.github.com/transparency/ is great place to fiddle around with your data and templates.

To enable debug mode, call .render with a {debug: true} config and open the javascript console.

`javascript
$('container').render(data, {}, {debug: true});
``

Development environment

Install node.js 0.8.x and npm. Then, in the project folder

$ npm install grunt -g # command-line build tool to enable TDD, auto-complation and minification
$ npm install # Install the development dependencies
$ grunt # Compile, run tests, minify and start watching for modifications

The annotated source code should
give a decent introduction.

Contributing

All the following are appreciated, in an asceding order of preference

1. A feature request or a bug report
2. Pull request with a failing unit test
3. Pull request with unit tests and corresponding implementation

In case the contribution is changing Transparency API, please create a ticket first in order to discuss and
agree on design.