Reading-Notes

Class 13: - Local Storage

• Local Storage- The past, present & future of local storage for web applications

---

Local Storage

• cookies: they send data from the browser to the server constantly.

  • they send data over and over needlessly
  • send unencrypted data
  • the data they send is limited to 4kb

• userdata: allows a certain amount of data for web pages to store.

• html5 storage: a way to store key/value pairs locally on the client/users web browser.

  • unlike cookies the data isn’t transmitted to a remote server

However, the data is actually stored as a string. If you are storing and 
retrieving anything other than strings, you will need to use functions like 
parseInt() or parseFloat() to coerce your retrieved data into the expected 
JavaScript datatype.(local Storage)

• setitem*(): calling with a key that has a value pair rewrites the value of the named key that already exists.

• getitem(): calling with a key that has been declared will return null rather than throw an error.

With html storage you can implement that in your code and not lose data that has been changed within your code. for example when making a game without using html storage you lose progress as soon as the page is closed.

• object store: databases with records and fields, with each field with a specific datatype.

  • Changes to the object store are called transactions