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The Web Storage API is a simple syntax for storing and retrieving data in the browser. It is very easy to use:
localStorage.setItem("name", "John Doe");
localStorage.getItem("name");
The Web Storage API is supported in all browsers:
| Chrome | Internet explorer | Mozila Firefox | Safari | Opera |
|---|---|---|---|---|
| Chrome | IE/Edge | Firefox | Safari | Opera |
| Yes | Yes | Yes | Yes | Yes |
The localStorage Object #
The localStorage object provides access to a local storage for a particular Web Site. It allows you to store, read, add, modify, and delete data items for that domain.
The data is stored with no expiration date, and will not be deleted when the browser is closed.
The data will be available for days, weeks, and years.
Storage Object Properties and Methods #
| Property/Method | Description |
|---|---|
| key(n) | Returns the name of the nth key in the storage |
| length | Returns the number of data items stored in the Storage object |
| getItem(keyname) | Returns the value of the specified key name |
| setItem(keyname, value) | Adds that key to the storage, or update that key’s value if it already exists |
| removeItem(keyname) | Removes that key from the storage |
| clear() | Empty all key out of the storage |
Related Pages for Web Storage API #
| Property | Description |
|---|---|
| window.localStorage | Allows to save key/value pairs in a web browser. Stores the data with no expiration date |
| window.sessionStorage | Allows to save key/value pairs in a web browser. Stores the data for one session |
