Vue.js 3 and Firebase for Beginners - Refs and Adding to Basket

The video tutorial explains the concept of refs in Vue.js, which act as wrappers for values, making them reactive. It covers setting up refs, creating functions to update them, and displaying their data in templates. The tutorial also delves into the properties of reactive objects and how to manipulate them using methods like push. Finally, it demonstrates how to loop over data in templates and update the display dynamically.

What is the primary benefit of using a ref in Vue.js?

• It makes the code run faster.

• It provides better error handling.

• It simplifies the code structure.

• It allows for automatic updates across components when the data changes.

What is the initial value set for the basket variable in the Vue.js setup?

• A string with the value 'empty'

• A number with the value 0

• An empty array

• A null value

How can you trigger a function in a Vue.js template?

• By using a button with a specific ID

• By using the @click directive on an element

• By calling the function directly in the script

• By using a special Vue.js keyword

What property is automatically added to a ref object in Vue.js?

• A 'state' property

• A 'ref' property

• A 'value' property

• A 'data' property

When updating a ref in a script, what must you access to change its data?

• The ref's type

• The ref's ID

• The ref's name directly

• The ref's value property

What is required when looping over items in Vue.js to ensure each item is unique?

• A unique method

• A unique style

• A unique key

• A unique class name

How is the total price for each line in the basket calculated?

• By subtracting a discount from the price

• By adding a fixed tax to the price

• By multiplying the price by the item quantity

• By dividing the price by the item quantity