Consider this scenario: You are loading a script (script 1) on your page which two other scripts rely on to function (scripts 2 and 3). All of these scripts can be safely executed after construction of the DOM. Which of the following approaches would work when loading these scripts? Select all that apply.
Load all of the scripts asynchrously so they don’t block DOM construction while the browser fetches
them, but make sure to include script 1 first in the HTML.
Load script 1 normally (without an async or defer) attribute and load scripts 2 and 3 with the
defer attribute.
Load all 3 scripts with the defer attribute, making sure to include script 1 first in the HTML.
It doesn’t matter. The scripts can be executed in any order.
Explanation: The selected answers are Load script 1 normally (without an async or defer) attribute and load scripts 2 and 3 with the defer attribute and Load all 3 scripts with the defer attribute, making sure to include script 1 first in the HTML. In this scenario, script 1 serves as a prerequisite for scripts 2 and 3, meaning they depend on it to be fully loaded and executed before they can function properly. By loading script 1 normally, without the async or defer attribute, in the HTML document’s head, it ensures that script 1 is executed synchronously, blocking the parsing of the HTML document until it’s fully loaded and executed. However, scripts 2 and 3 can be deferred using the defer attribute, allowing them to be loaded asynchronously while still ensuring that they wait for the DOM to be fully constructed before executing. This approach guarantees that script 1 is executed first, meeting the dependency requirements of scripts 2 and 3 and ensuring that they function correctly. Alternatively, loading all three scripts with the defer attribute ensures that they are all deferred and executed after the DOM is fully constructed, maintaining the necessary order of execution with script 1 being loaded first in the HTML. These approaches ensure the proper execution order of the scripts while optimizing performance by minimizing rendering delays and improving page load times.