how I can change default icon in chrome extension?

Here I am working with chrome extension development.

my manifest.json p开发者_C百科age as show

{
"name": "DemoExtension",
  "version": "1.0",
  "description": "Official addon from demeo",
  "browser_action": {
    "default_icon": "star-on.png",
    "popup": "shopcmp.htm"  
  },
  "permissions": [
    "tabs"    
  ],
  "background_page": "background.html"   
}

Here I want to change my default icon image at runtime.

If you want to change the browser action default icon, just change

"browser_action": {
  "default_icon": "star-on.png", //<--this line: change "star-on.png" to the icon you want
  "popup": "shopcmp.htm"  
},

That line indicates the default icon on first load of the extension.
To change the icon in code, call chrome.browserAction.setIcon(details).

If you want to change the extension icon (the icons that shows during installation, in the Chrome Web Store, in the extension management page, and as a favicon), add an icons property to your manifest.json file.

To change the default chrome extension pragmatically you can do:

chrome.browserAction.setIcon({ path: "my-icon.png" });

or for custom sizes:

chrome.browserAction.setIcon({
  path: {
    19: "my-icon19.png"
  }
});

Full docs: https://developer.chrome.com/docs/extensions/reference/browserAction/#method-setIcon

with the new manifest v3 the standard for changing an icon at runtime is now

chrome.action.setIcon()

Note: if you are referencing an image within your extension folder, use absolute paths. For example, /icon.png, not icon.png, or you will trigger a Failed to fetch error.

if you want every page has its own icon status, use chrome.pageAction.