ESMScript.js

class Rotator {

    /** 
     * @attribute
     * Including the `@attribute` block tag exposes the property to the editor.
     */
    speed = 10
    
    /** 
     * This is not an attribute and is not exposed to the editor
     */
    notAnAttribute = false

    /** 
     * @attribute
     * Attributes can surface additional contextual metadata in the form of custom tags, 
     * which provide addition information. In the editor this is used to make decisions 
     * about presenting UI controls.
     * 
     * Range, step, precision specifies numerical constraints
     * @range [0.1, 10]
     * @precision 0.01
     * @step 0.005
     */
    velocity = 2

    /**
     * @attribute
     * The first paragraph of tex content in an attribute commenbt becomes a description
     * in attribute metadata.
     * 
     * The `@title` tag becomes a short label
     * @title Max Speed
     */
    someObscureAndLongInternalPropertyName = 'hmm'

    /**
     * @attribute
     * If an attribute is initialized, it's type is inferred. If not, it
     * must be defined via the `@type` tag. Without either, the attribute
     * is invalid and is ignored. If both exist, the inferred type is used
     * 
     * @type {string}
     */
    uninitializedString
    
    /**
     * @attribute
     * This covers the 'json' use case, and allows for complex type
     * 
     * @type {EnemyType}
     */
    enemy = new EnemyType()

    /**
     * @attribute
     * @type {Lights}
     */
    lights = 1

}

/**
 * @serializable - TBD
 * The `@serializalbe` allows a class to be used as an attribute type
 */
class EnemyType {

    /**
     * @attribute
     */
    speed = 10

    /**
     * @attribute
     */
    power = 3

}

/**
 * @enum
 * The `@enum` tag marks
 */
class Lights {
    ON = 1
    OFF = 0
    UNKNOWN = 0.5
}