How to clear chrome.storage.local and chrome.storage.sync?

Question

I've written a Chrome Extension for my library. It uses chrome.storage.local to cache things.

Does anyone know how to drop the cache for testing purposes? I can't really test things anymore as all the data is now in cache. I'd like to drop it and make sure it gets repopulated correctly, etc. How do I do that?

I tried "Refresh"-ing the extension but that did nothing. Removing and adding the extension doesn't appear to clean cache either.

removing extension will remove chrome.storage.local too. You maybe have code that will populate it on very installation so you see the same data, but when extension is removed, chrome will remove its storage too — Wolf War, Aug 04 '15 at 15:21
Yep, removing the extension works. Fking chrome should have given the dev some kind of warning before clearing the data, while on developer mode. — Pacerier, Aug 06 '17 at 05:57

wOxxOm · Accepted Answer · 2021-09-15T13:31:41.533

98

Use chrome.storage.local.clear() and chrome.storage.sync.clear()

The API is asynchronous so to do subsequent actions to the storage, use a callback:

chrome.storage.local.clear(function() {
    var error = chrome.runtime.lastError;
    if (error) {
        console.error(error);
    }
    // do something more
});
chrome.storage.sync.clear(); // callback is optional

edited Sep 15 '21 at 13:31

answered Aug 04 '15 at 15:14

wOxxOm

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score 39 · Answer 2 · answered Mar 02 '17 at 16:57

39

You can also use chrome.storage.local.remove() method if you want to remove any specific or list of specific object from Storage

chrome.storage.local.remove(["Key1","key2"],function(){
 var error = chrome.runtime.lastError;
    if (error) {
        console.error(error);
    }
})

answered Mar 02 '17 at 16:57

Satish Kumar sonker

1,250
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3

Is there a developer tool that can be used to see the storage state and allows me to clear it. – rbansal Jul 25 '22 at 02:10

score 2 · Answer 3 · edited Apr 02 '19 at 07:42

2

Check this out

chrome.storage.local.remove(keyName,function() {
 // Your code
 // This is an asyn function
});

Check full details https://developer.chrome.com/extensions/storage

edited Apr 02 '19 at 07:42

barbsan

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answered Jul 12 '18 at 10:03

Hp Sharma

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ibrahim · Answer 4 · 2022-11-04T11:07:44.373

This is a old question but those who using new manifest v3 can use session storage type in order to keep variables only on ram. They will be removed if chrome is restarted or extension is reloaded.

Example:

//to set a session value
var session_var = "foo"
chrome.storage.session.set({session_var: session_var}, function () {
    console.log("session value set");
});

//to get session value 
chrome.storage.session.get({session_var: "this is default value"}, function (result) {
    session_var = result.session_var;
});

How to clear chrome.storage.local and chrome.storage.sync?

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