Fill in the blanks to clear all values stored in the localStorage. Then store "a" using the key "b"?

Question

localStorage.clear ();
localStorage.
setItem("a" , "b" );

The top is my code why does it not work?

Answer 1

I got the answer it is

localStorage.clear ();
localStorage.
setItem("b" , "a" );

Why is it "b" before "a" I thought the order did not matter since it did not state it in the question.

Answer 2

Parameters of setItem() function have an important order:

localStorage.setItem(key,value);

So, when you getItem():

value=localStorage.getItem(key);

However, this isn't the reason for the code don't work...
I suppose you have tested it in code playground, isn't it? Because I have tested in code playground ( tablet, android, chrome ), where an exception is raised, then in "real" situation ( means in local, desktop, firefox ), where all is alright ^^

I deduce that there is a problem with how code playground manage, or with the localstorage on android/chrome... but anyway in your code :)

Answer 3

More probably a question of authorization: localstorage, by definition, is local relative to the client side ( user ), not to the server side ^^

Answer 4

You must see the order of the arguments of the function before use it

Answer 5

Yes, still... I'll test in browsers ( desktop and android: I haven't precised that I was use the app ^^ )

Answer 6

There's no problem with browser android, so the problem's only on the app... probably an authorization in android!

The error message:
"Serrurity Error not detected: Failed to read the 'localStorage' property in 'Window': Access is denied for this document."

Answer 7

Maybe there is no localStorage on playground

Answer 8

It's relative to the navigator. Are you still having problem using localStorage in playground?

Answer 9

Must be a problem with permissions in app.
Mobile devices are more problematic than browsers ever ^^

Answer 10

This is because the data is stored in key/value pairs: with the pair having the key as the initial entry. The question had stated the need to use the key "b" to store the value "a".