BrowserTabGroup.collapsed
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Description:
Attribute
The readonly collapsed
attribute exposes the collapsed state of the browser tab group. On getting, the attribute returns true if the browser tab group is collapsed, otherwise it returns false.
Property
When specified as an item in a BrowserTabGroupProperties
object, the collapsed
property indicates the desired collapsed state of a browser tab group. The value true
indicates that the tab group should be collapsed, and false
indicates the tab group should be expanded.
When creating a browser tab group, if this property is not specified the default behaviour is the same as specifying false
.
When updating a browser tab group, if this property is not specified, the default behaviour is to leave the collapsed state unchanged.
Syntax:
Attribute
readonly boolean collapsed
Property
boolean collapsed
Example:
The following example creates a button on the browser toolbar. When the button is clicked, a tab group is created containing two tabs. Then the new tab group is collapsed.
//
// 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() {
// Create two tabs with specified URLs
var tab1 = opera.extension.tabs.create({url: 'http://www.reddit.com/'});
var tab2 = opera.extension.tabs.create({url: 'http://www.digg.com/'});
// Create a tab group containing the above two tabs
var tabGroup = opera.extension.tabGroups.create([tab1, tab2]);
// Collapse the new tab group
tabGroup.update({collapsed: true});
}
};
// Create the button and add it to the toolbar.
var button = opera.contexts.toolbar.createItem( UIItemProperties );
opera.contexts.toolbar.addItem(button);
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