Tips on how to Use Storage in Internet Extensions


Engaged on an online extension is an fascinating expertise — you get to style internet whereas working with particular extension APIs. One such API is storage — the online extension taste of persistence. Let’s discover how you should use session and native storage inside your Manifest V3 internet extensions!

Enabling Extension Storage

The extension storage API is not accessible by default. To allow the storage API, it’s essential cite it within the manifest.json file of your extension:

  // extra....
  "manifest_version": 3,
  "identify": "__MSG_appName__",
  "permissions": [
    // more....
  // extra....

Including storage to the permissions array, which is a prime stage manifest.json key, supplies session and native storage capabilities to your extension.

Get, Set, and Take away Storage Values

Very like conventional localStorage and sessionStorage APIs, extension storage supplies get, set, and take away operations:

// set
await{ identify: "David", shade: "inexperienced" });

// get 
const { identify, shade } = await["name", "color"]);

// take away
await away(["name", "color"]);

Just a few issues to notice:

  • get requires an array argument, not a single worth like localStorage and sessionStorage
  • set must be an object format
  • take away can be an array, very like get
  • You should use or relying on how
  • The entire extension storage API strategies are promise-based, with await or callback codecs

Clear All Storage

Within the occasion that you simply wish to clear all information for native or session storage, there is a clear technique:


Utilizing clear is efficient however you may wish to make sure that you do really wish to clear all the things — clear might turn out to be a upkeep challenge.

Storage is a necessary a part of most internet extensions. Whereas the API is easy, the async format and technique names are totally different.


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