By Opera Software

From Opera 15 onward, Opera 11 & 12’s extension format is no longer supported, and instead, we’ve switched to Chromium’s extension model. Check out our new documentation for developing extensions for Opera 15 and higher and start building your own extensions.


The close() method provides a way to close a browser tab group along with all browser tabs within the associated tab collection.




void close ()


The following example creates a button on the browser toolbar. When the button is clicked, the collapsed state of all tab groups is checked and any collapsed groups are closed.

// The background process (e.g. index.html)

// Specify the properties of the button before creating it.
var UIItemProperties = {
  disabled: false,
  title: "Example extension",
  icon: "images/icon_18.png",
  onclick: function() {
    try {
      // Get all the tab groups
      var groups = opera.extension.tabGroups.getAll();

      // Loop through the groups
      for (var i = 0, len = groups.length; i < len; i++) {
        // If a group is collapsed, close it
        if (groups[i].collapsed === true) {

    } catch(e) {}


// Create the button and add it to the toolbar.
var button = opera.contexts.toolbar.createItem( UIItemProperties );

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