GDevelop/Extensions/ExampleJsExtension/examplejsextensiontools.js

/**
 * This is an example of some functions that can be used through events.
 * They could live on any object but it's usual to store them in an object
 * with the extension name in `gdjs.evtTools`.
 *
 * Functions are being passed the arguments that were declared in the extension.
 *
 * @memberof gdjs.evtTools
 * @class exampleJsExtension
 * @static
 * @private
 */
gdjs.evtTools.exampleJsExtension = {};

gdjs.evtTools.exampleJsExtension.myConditionFunction = function(number, text) {
  return number <= 10 && text.length < 5;
};

gdjs.evtTools.exampleJsExtension.getString = function() {
  return 'Hello World';
};

/**
 * You can also attach an object to gdjs, that you can use to store more information
 * or objects - even if you should have doing so as global state can make things harder
 * to debug. Most of the time you can have all the logic in your functions, your gdjs.RuntimeBehavior
 * or your gdjs.RuntimeObject.
 */
gdjs.exampleJsExtension = {
  myGlobalString: 'Hello World',
};

/**
 * In **rare cases** you may want to run code at the start of the scene. You can define a callback
 * that will be called at this moment.
 */
gdjs.registerRuntimeSceneLoadedCallback(function(runtimeScene) {
  console.log('A gdjs.RuntimeScene was loaded:', runtimeScene);
});

/**
 * In **rare cases** you may want to run code at the end of a scene. You can define a callback
 * that will be called at this moment.
 */
gdjs.registerRuntimeSceneUnloadedCallback(function(runtimeScene) {
  console.log('A gdjs.RuntimeScene was unloaded:', runtimeScene);
});

/**
 * In **very rare cases** you may want to run code whenever an object is deleted.
 */
gdjs.registerObjectDeletedFromSceneCallback(function(
  runtimeScene,
  runtimeObject
) {
  console.log(
    'A gdjs.RuntimeObject was deleted from a gdjs.RuntimeScene:',
    runtimeScene,
    runtimeObject
  );
});

// Finally, note that you can also simply run code here. Most of the time you shouldn't need it though.
console.log(
  'gdjs.exampleJsExtension was created, with myGlobalString containing:' +
    gdjs.exampleJsExtension.myGlobalString
);