Feature

With the introduction of the JavaScript Models module - models can be used in light-modules, the JS syntax makes them well suitable for frontend developers.

The commands create-page and create-component should be able to create a JS model optionally.
Proposed option: -m or -jsm.

Solution

On the template definition add this line:

modelClass: info.magnolia.module.jsmodels.rendering.JavascriptRenderingModel

Create an additional file in the same directory as the template def. and script are created. File name must be <template-name>.js.
Add dummy code to the model file such as this:

/**
 * Define properties and methods which can be accessed on the template script.<br/>
 * You can use Magnolia rendering context objects content, def, ctx, state, i18n.<br/>
 * For further info see https://documentation.magnolia-cms.com/display/DOCS/JavaScript+Models+module.<br/>
 */
var Foobar = function () {
    this.getRandomNumber = function () {
        return Math.random();
    }
};
new Foobar();

EDIT:
As discussed in the PR, we used prototype with javascript model. The solution above has changed, command for creating a template with js model is following:
mgnl create-<page/component> newPageOrComponent -P with-js-model