Interview question | Page Factory | Lazy loading

Here is the interview question:

As per "Page Factory", all the elements will be initialized at the time of page load.
But in dynamic applications how page factory works?
Ex: Assure a drop down content ( options)  loads on click of the respected select box, how can you implement page factory for this?, as page factory initializes elements at the time of page load only.

Answer:
Lazy load concept.

AjaxElementLocatorFactory is a lazy load concept in Page Factory pattern to identify WebElements only when they are used in any operation
i.e. a timeOut for a WebElement can be assigned to the Object page class with the help of AjaxElementLocatorFactory.

Syntax : ( similer to plain "Page Factory init elemnts"  method )

PageFactory.initElements(new c(driver, 30), this);

If element not found in 30 secs, NoSuchElemementException throws.

happy coding.