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Editorial Team
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Asked: 2026-05-24T06:28:53+00:00

I am learning to write javascript and Chrome extensions. I want an extension that

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I am learning to write javascript and Chrome extensions. I want an extension that will show a button, and when a user clicks the button it will add a bookmark folder in the bookmarks.
So far so good (the button appears), but clicking it adds nothing.

I suppose my JavaScript is not correct.

Here is the code:

Manifest:

{
  "name": "My First Extension",
  "version": "1.0",
  "background_page": "background.html",
  "permissions": [
    "tabs", "http://*/*", "bookmarks"
  ],
  "browser_action": {
      "default_icon": "icon.png",
      "name": "HELLO WORLD"
  }
}

background.html:

<html>
<head>
<script>

  function updateIcon() {
    chrome.bookmarks.create({parentId: bookmarkBar.id,
                         title: 'Extension bookmarks'});
                  }

  chrome.browserAction.onClicked.addListener(updateIcon);
  updateIcon();

);
</script>
</head>
</html>

I suppose it is this part:

function updateIcon() {    chrome.bookmarks.create({parentId: bookmarkBar.id,
                     title: 'Extension bookmarks'});
              }

That code is wrong.

Please, advise me and any good places for learning JavaScript. I have read this web page already.

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1 Answer

  1. Editorial Team

    You have an obvious syntax error.

      function updateIcon() {
    chrome.bookmarks.create({parentId: bookmarkBar.id,
                         title: 'Extension bookmarks'});
                  }

  chrome.browserAction.onClicked.addListener(updateIcon);
  updateIcon();

); // <-- what is this doing here?
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