In order to make the program recognize the clicking of a button, the engineer should add an event listener to the JavaScript code.
An event is considered to be a vital part of JavaScript because a web page responds according to the event that occurred. Some events are generated by APIs and some are user-generated events. For example, clicking or moving the mouse button and pressing a key on the keyboard are user generated events.
In order to handle the user-generated events in JavaScript, an event listener is used. An event listener is a function or procedure in a JavaScript program that waits for an event to occur; such as pressing a key on the keyboard or clicking the button. Therefore based on the scenario given in the question statement, the engineer should use an event listener to his JavaScript code so that the code can recognize the click of the button.
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It's important to do so because you want to be sure it looks professional, just like it's important to add a cover to a report. It's also the first look at the resume and gives the overall look of it. It lets the job or employer know the specifics and into the resume talk more of what you do. It's like the overall information page..... Hope this helps.
Answer:

Explanation:
The statements are logically equivalent if they have the same truth tables. So let´s use truth tables in order to determine if they are logically equivalent or not:
The picture that I attached you shows the truth table for each case. As you can see in the highlight columns:

They are logically equivalent because they have exactly the same truth values between each other. Hence, we can conclude that they are logically equivalent.