Metal.js is a lightweight, easy-to-use JavaScript framework that lets you create UI Components with ease, thanks to its integration with templating languages.

metal-js-home-page.png

Figure 1: You can create UI’s easily, thanks to Metal.js.

Metal.js is built with you in mind, offering flexibility with how your rendering logic is handled. You can use template languages to write your rendering logic or keep your rendering logic and business logic within the same file if you prefer.

By default, Metal.js offers integration points with Google closure templates and Facebook JSX templates. The rendering layer is completely customizable though, so you can add more rendering options if needed.

Below is an example of a closure(Soy) template written for Metal.js:

{template .render}
// ...
<button onClick="{$close}" type="button" class="close">
// ...
{/template}

Metal.js has two main classes: State, and Component which extends from State. The Component class adds additional rendering features for your Component. If your Component doesn’t require rendering, you can just use State.

The figure below illustrates the architecture for Metal.js:

metal-js-architecture.png

Figure 2:

Metal.js takes full advantage of the ECMAScript 6 (AKA ECMAScript 2015) language, so you can use the latest features that the language has to offer. Below is a list of some of the great features that you get with ES6:

  • Class syntax like other OO languages. Classes support prototype-based inheritance, super calls, instance and static methods and constructors.
  • Arrow method syntax. var odds = numbers.map(v => v + 1);
  • Language-level support for modules for Component definition. Codifies patterns from popular JavaScript module loaders like AMD (as shown below):

    export function sum(x, y) {
      return x + y;
    }
    export var pi = 3.141593;
    

These are just a few of the ES6 features available that you can use in your Metal.js components.

Related Topics

Creating a Soy Portlet

JavaScript Module Loaders

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