lesson 1

Question 1

What are the 2 fundamental techs in progressive web apps?

Answer 1

• Service workers

- Webapp manifest file

Question 2

What is a service worker?

Answer 2

• Js file that stays between the client and the server.
• The apps can work offline
• Apps load no matter the network connection thanks to cache.
• They dont depend on the browser being open in mobile. They still work.

Question 3

What web app manifest file?

Answer 3

• It controls how your app displays to the user in areas where they expect to see apps and how they can launch it.
• You can add your web app to the mobile home screen and it displays full screen

Question 4

What is a app shell?

Answer 4

• Is the part that dont change often, not the content or data.
• The minimum css, html and js to load a web app.
• It can operate in slow or no networks
• Cache it using a service worker
• instant loading

Question 5

Why use app shell?

Answer 5

• The web app loads much faster

Question 6

What goes in app shell?

Answer 6

• Some html
• Some css
• Some js
• Some images
• No data

Question 7

In progressive how to get data fast?

Answer 7

• Inject the initial data in the js file

Question 8

What is the cache object?

Answer 8

• It is a way of storage.
• It is asyncronos and fast.
• It is not compatible with many browsers so you need to feature detect

Question 9

What is indexedDB?

Answer 9

It is a way of storage.

• It is asyncronos and fast.
• Compatible
• Transacctional
• Some good alternatives are localforage and lovefield