被激发当 DOMContentLoaded event is fired in the page. At this point the document is loaded and parsed, and the DOM is fully constructed, but linked resources such as images, stylesheets and subframes may not yet be loaded.
browser.webNavigation.onDOMContentLoaded.addListener(
listener
,
// function
filter
// optional object
)
浏览器
.
webNavigation
.
onDOMContentLoaded
.
removeListener
(
listener
)
浏览器
.
webNavigation
.
onDOMContentLoaded
.
hasListener
(
listener
)
Events have three functions:
addListener(callback)
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:
details
对象
. Details about the navigation event.
filter
可选
对象
. An object containing a single property
url
, which is an
数组
of
events.UrlFilter
objects. If you include this parameter, then the event will fire only for transitions to URLs which match at least one
UrlFilter
in the array. If you omit this parameter, the event will fire for all transitions.
tabId
integer
. The ID of the tab in which the navigation has occurred.
url
string
. The URL to which the given frame has navigated.
processId
integer
. The ID of the process in which this tab is being rendered.
frameId
integer
. Frame in which the navigation is occurring.
0
indicates that navigation happens in the tab's top-level browsing context, not in a nested
<iframe>
. A positive value indicates that navigation happens in a nested iframe. Frame IDs are unique for a given tab and process.
timeStamp
编号
. The time at which
DOMContentLoaded
was fired, in
milliseconds since the epoch
.
BCD tables only load in the browser
Logs the target URLs for
onDOMContentLoaded
, if the target URL's hostname contains "example.com" or starts with "developer".
const filter = {
url:
[
{hostContains: "example.com"},
{hostPrefix: "developer"}
]
}
function logOnDOMContentLoaded(details) {
console.log(`onDOMContentLoaded: ${details.url}`);
}
browser.webNavigation.onDOMContentLoaded.addListener(logOnDOMContentLoaded, filter);
注意：
This API is based on Chromium's
chrome.webNavigation
API. This documentation is derived from
web_navigation.json
in the Chromium code.
Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.
最后修改： , 由 MDN 贡献者