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tabs.moveInSuccession() 编辑

Modifies the succession relationship for a group of tabs.

Using the tabs API, a tab can be assigned a successor tab in the same window. If tab B is the successor of tab A, and tab A is closed while it is the active tab, tab B will be activated next. If tab A doesn't have a successor, then the browser is free to determine which tab to activate next. If tab B is the successor of tab A, then tab A is called a predecessor of tab B. A tab can have at most one successor, but it can have any number of predecessors. A tab cannot take itself or a tab in a different window as a successor.

All tabs start out with no successor; tabs only get a successor if assigned one by a WebExtension. However, the browser must not orphan a tab in a succession relationship with other tabs, if possible: if tab B is the successor of tab A, and tab C is the successor of tab B, and B is closed (or moved to another window), then tab A will take tab C as its successor. Preventing C from being orphaned in this way is called moving a tab (B) from its line of succession.

tabs.moveInSuccession() takes an array of tab IDs, and moves all of those tabs from their lines of succession. It then makes each tab the successor of the previous tab in the array, forming a chain. It can optionally set the successor of the last tab in the chain to an anchor tab, which is not moved from its line of succession. Additional options can control whether the tab chain is "prepended" or "appended" to the anchor tab, and whether the operation acts like a linked-list insert.

While the successor tab can be assigned with tabs.update(), it is often desirable to use tabs.moveInSuccession() to change successors, even if only a single tab is having its successor assigned. The difference is that browser.tabs.moveInSuccession([a], b) moves tab a from its line of succession, so any predecessors of a will adopt a's previous successor; whereas if browser.tabs.update(a, {successorTabId: b}) is used instead, tab a may continue to be the successor of other tabs, which could be unexpected. Another advantage of tabs.moveInSuccession() is that all of the succession changes happen atomically, without having to worry about races between calls to tabs.update() and tabs.get() and other operations like the user closing a tab.

Syntax

browser.tabs.moveInSuccession([1, 3, 5, 7, 2, 9], 4, {insert:true})

Parameters

tabIds

array of integer. An array of tab IDs. The order of the elements in the array defines the relationship of the tabs. Any invalid tab IDs, or tab IDs corresponding to tabs not in the same window as tabId (or the first tab in the array, if tabId is omitted), will be ignored—they will keep their current successors and predecessors.

tabId Optional

integer. The ID of the tab that will be the successor of the last tab in the tabIds array. If this ID is invalid or tabs.TAB_ID_NONE, the last tab will not have a successor. Defaults to tabs.TAB_ID_NONE.

options Optional

object.

append Optional: boolean. Determines whether to move the tabs in tabIds before or after tabIdin the succession. If false, the tabs are moved before tabId, if true, the tabs are moved after tabId. Defaults to false.
insert Optional: boolean. Determines whether to link up the current predecessors or successor (depending on options.append) of tabId to the other side of the chain after it is prepended or appended. If true, one of the following happens: if options.append is false, the first tab in the array is set as the successor of any current predecessors of tabId; if options.append is true, the current successor of tabId is set as the successor of the last tab in the array. Defaults to false.