Fired when the properties of a contextual identity, such as its name, icon, or color, are changed. Contextual identities may be updated by extensions using the
contextualIdentities
API, or directly by the user, using the browser's user interface.
browser.contextualIdentities.onUpdated.addListener(listener)
浏览器
.
contextualIdentities
.
onUpdated
.
removeListener
(
listener
)
浏览器
.
contextualIdentities
.
onUpdated
.
hasListener
(
listener
)
Events have three functions:
addListener(listener)
Adds a listener to this event.
removeListener(listener)
Stop listening to this event. The
listener
argument is the listener to remove.
hasListener(listener)
校验是否
listener
is registered for this event. Returns
true
if it is listening,
false
否则。
callback
Function that will be called when this event occurs. The function will be passed the following arguments:
changeInfo
对象
. An object that contains a single property,
contextualIdentity
, which is a
contextualIdentities.ContextualIdentity
object representing the identity whose properties were updated.
BCD tables only load in the browser
function handleUpdated(changeInfo) {
console.log(`Updated: ${changeInfo.contextualIdentity.name}`);
}
browser.contextualIdentities.onUpdated.addListener(handleUpdated);
最后修改： , 由 MDN 贡献者