Loan Calculator [Part 2] - Calculate & Error

The video tutorial guides viewers through adding JavaScript to handle form submissions, calculate loan payments, and manage UI interactions. It covers setting up event listeners, creating functions to calculate results, defining UI variables, performing loan calculations, and implementing error handling with user feedback. The tutorial emphasizes best practices in JavaScript coding and UI design.

What is the purpose of adding an event listener to the submit button in a form?

• To change the button's color

• To prevent the form from being displayed

• To handle form submissions

• To add a new input field

What is the role of the 'preventDefault' method in form handling?

• To validate the form inputs

• To reset the form fields

• To prevent the default form submission

• To allow the default form submission

Which method is used to retrieve an element by its ID in JavaScript?

• getElementsByClassName

• getElementsByTagName

• getElementById

• querySelector

Which of the following is a common convention for naming UI-related variables in JavaScript?

• Using a prefix 'UI'

• Using a suffix 'Var'

• Using a prefix 'DOM'

• Using a suffix 'Element'

What is the purpose of using parseFloat on form input values?

• To convert them to integers

• To convert them to boolean values

• To convert them to strings

• To convert them to decimal numbers

Which JavaScript method is used to check if a number is finite?

• isDecimal

• isInteger

• isNumber

• isFinite

What is the purpose of using 'toFixed' method on numbers?

• To format numbers to a fixed number of decimal places

• To convert numbers to boolean values

• To round numbers to the nearest integer

• To convert numbers to strings

What is the purpose of the setTimeout function in JavaScript?

• To stop the execution of a function

• To execute a function immediately

• To delay the execution of a function

• To repeat the execution of a function

How can you dynamically create an HTML element using JavaScript?

• Using document.querySelector

• Using document.appendChild

• Using document.createElement

• Using document.removeChild

Which method is used to insert a new element before an existing one in the DOM?

• replaceChild

• insertBefore

• removeChild

• appendChild