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A
ll three,
localStorage.getItem('key')
,
localStorage.key
, and
localStorage['key']
methods, do the same thing. However, it is advisable to use the provided methods for the following reasons:
localStorage.getItem('key-does-not-exist')
returns
null
, whereas
localStorage['key-does-not-exist']
will return
undefined
. In JavaScript,
null
is not equal to
undefined
.
For example, s
uppose that you want to set a key that is actually the property of an object as well, or as a function name, such as
getItem
and
setItem
. In this case, you're better off with the
getItem
approach, as follows:
localStorage.setItem('getItem', 'whohoo we are not overwriting getItem'); // #1localStorage.getItem('getItem'); ...
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