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What is the proper way to set a variable in localStorage?
localStorage.hello = 'world'
or
localStorage.setItem('hello','world')
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If you want to store two different values in localStorage then you can do somrthing like this : setItem in localStorage two times with different keys. localStorage. setItem("message", taskMessage); localStorage.
Go to the website you wish to modify its localstorage. Enter your console (I press F12 in Chrome or Edge). Press the "Application" tab on top. Choose localstorage on the menu and then the website address underneath.
Like SessionStorage, LocalStorage also used for storing the data on the client side. Maximum limit of data saving is about 5 MB in LocalStorage also. LocalStorage has no expiration time, Data in the LocalStorage persist till the user manually delete it.
getItem(): How to get items from localStorage To get items from localStorage, use the getItem() method. getItem() allows you to access the data stored in the browser’s localStorage object. getItem() accepts only one parameter, which is the key, and returns the value as a string. To retrieve a user key:
We can use following methods on the global localStorage object to manage client-side data: Use the setItem () function to store an item in LocalStorage. This function takes a key as its first argument and a value as the second argument. As mentioned earlier, both must be strings. In your browser's console let's add an item to our localStorage:
setItem(): How to store values in localStorage. Just as the name implies, this method allows you to store values in the localStorage object. It takes two parameters: a key and a value. The key can be referenced later to fetch the value attached to it. Where name is the key and Obaseki Nosa is the value.
Double-click a cell in the Key or Value column to edit that key or value. Figure 6. Editing a localStorage key View a domain's localStorage key-value pairs. Click the key-value pair that you want to delete.
The method used is very unlikely to matter. The standard lists that the following methods are equivalent:
storage.setItem (key, value) storage[key] = valueSets the value of the pair identified by key to value, creating a new key/value pair if none existed for key previously.
Very unusual situations in which setItem and getItem would be preferred over dot notation assignment or retrieval would be when properties on the prototype might be referenced - such as with .length and .__proto__. (But dynamic storage keys are a pretty bad idea - better to organize them into their own array or object in a single storage key instead. If the keys aren't dynamic, such collisions shouldn't occur in sane code, unless someone forgot that length is reserved)
For an example of a problematic use of length with dot notation:
localStorage.length = '123'
console.log(localStorage.length)
will not give you 123, but the number of keys in storage. (The assignment silently fails.) On the other hand, using setItem and getItem with length (or any other arbitrary string) will work.
getItem and setItem are also more compatible with type-checking systems like TypeScript and Flow than dot notation.
Personally, when I'm not using TypeScript, and when the storage key is static, I use dot notation because it's more concise and doesn't cause any problems.
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