opera.contexts.toolbar.length
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Description
This attribute contains the number of UI items held by the ToolbarContext
. Note: The ToolbarContext
is currently restricted to a maximum of one UI item, so this will be either 1 or 0.
Example:
This attribute is useful for checking whether a button is being displayed in the toolbar or not.
//
// The background process (e.g. index.html)
//
// Is there a button in the toolbar?
if (opera.contexts.toolbar.length) {
var buttonExists = true;
} else {
var buttonExists = false;
}
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