Is it possible to detect that a specific Chrome extension is installed from regular HTML page?

[Ian Formanek]

I would like to be able to check if our "Development support" google
chrome extension is installed from a regular html page displayed in
the browser (to suggest installing it, if not) - is that possible?

-Ian

[Ian Formanek]

[Gildas]

You can use an Image object to detect an extension icon. For example,
the function detectExtension above takes 2 parameters :
- the ID of the extension to detect
- the callback function
Callback function will be called with true as first parameter if
chrome-extension://<extension_id>/resources/icon_16.png is found,
false else.

function detectExtension(extensionId, callback) {
var img;
img = new Image();
img.src = "chrome-extension://" + extensionId + "/resources/
icon_16.png";
img.onload = function() {
callback(true);
};
img.onerror = function() {
callback(false);
};

[Arne Roomann-Kurrik]

Typically this kind of thing is done by having the extension insert a special dom node into the page you want to check on.  When the page loads, check for the presence of the node and prompt the user if it doesn't exist.

~Arne

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[Or Moushkatel]

Hi,

I try using your code, and i'm getting

(index):1 Denying load of chrome-extension://aapocclcgogkmnckokdopfmhonfmgoek/resources/icon_16.png. Resources must be listed in the web_accessible_resources manifest key in order to be loaded by pages outside the extension.

undefined

chrome-extension://invalid/:1 GET chrome-extension://invalid/ net::ERR_FAILED

When i'm submitting this in the URL location' i'm getting the image.

Any idea?

Thanks.

[PhistucK]

On Tue, Jun 14, 2016 at 5:33 PM, 'Or Moushkatel' via Chromium-Extensions-Announce <chromium-...@chromium.org> wrote:

Resources must be listed in the web_accessible_resources manifest key in order to be loaded by pages outside the extension.

Have you followed the message you got? Did you add it under web_accessible_resources?​

☆PhistucK

[parthiban dhanapal]

Then, you expose this file to the web pages with web_accessible_resources manifest key:

 "web_accessible_resources": ["images/Mylogo.png"],