An ability to run $A.createComponent() functionality using Promise API manner

[ruslan-kurchenko]

It would be nice to have an ability to create components dynamically with Promise API.

Here is the official documentation about this functionality with raw callback approach: https://developer.salesforce.com/docs/atlas.en-us.lightning.meta/lightning/js_cb_dynamic_cmp_async.htm

Below is a rough example of the implementation usage:

component.lax.createComponent(
  'lightning:button',
  {
    'aura:id': 'saveBtn',
    'label': 'Save',
    'onclick': component.getReference('c.onClickSave')
  }
)
.then(button => {
  const body = component.get('v.body');
  body.push(button);
  component.set('v.body', body);
})
.catch(error => {
  console.log("Error: " + error);
});

.createComponent(), .then() and .catch() fuctions must return LaxPromise object.
The API should be similar to server-side actions functionality.
Users will have an ability to chain several components creation:

component.lax.createComponent()
  .then(firstComponent => {
    return component.lax.createComponent(...)
  })
  .then(secondComponent => {
    // custom logic here
  })
  .catch(error => {
    console.log("Error: " + error);
  });

Note: The same functionality should be implemented to create a list of components - $A.createComponents(definitions)

[ruslan-kurchenko]

Released in v1.2