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How you can Use Storage in Internet Extensions

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

Enabling Extension Storage

The extension storage API is not obtainable by default. To allow the storage API, you could 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 high degree manifest.json key, supplies session and native storage capabilities to your extension.

Get, Set, and Take away Storage Values

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

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

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

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

A number of 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 utilize 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 methodology:


Utilizing clear is efficient however you may wish to make sure that you do actually wish to clear all the things — clear may develop into a upkeep problem.

Storage is an important a part of most internet extensions. Whereas the API is straightforward, the async format and methodology names are completely different.



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