webNavigation.onDOMContentLoaded

browser.webNavigation.onDOMContentLoaded.addListener(
  listener, // function
  filter, // optional object
);
browser.webNavigation.onDOMContentLoaded.removeListener(listener);
browser.webNavigation.onDOMContentLoaded.hasListener(listener);

事件有三个方法：

addListener(callback)

为此事件添加监听方法。

removeListener(listener)

停止监听此事件。listener 参数为需要移出的监听方法。

hasListener(listener)

检测是否有 listener 被注册在事件上。如果有返回 true , 否则返回false .

callback

为当此事件发生是需要被调用的函数。该函数将传递以下参数：

details

object. 有关导航（navigation）事件的详细信息。

filter可选

object. 包含单个属性 url 的对象，这是一个 events.UrlFilter (en-US) 数组对象。如果包含此参数，则该事件将仅触发转换为与数组中至少一个UrlFilter匹配的 URL。在数组中。如果你省略此参数，则该事件将触发所有转换。

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

number. The time at which DOMContentLoaded was fired, in milliseconds since the epoch.

Logs the target URLs for onDOMContentLoaded, if the target URL's hostname contains "example.com" or starts with "developer".

var filter = {
  url: [{ hostContains: "example.com" }, { hostPrefix: "developer" }],
};

function logOnDOMContentLoaded(details) {
  console.log("onDOMContentLoaded: " + details.url);
}

browser.webNavigation.onDOMContentLoaded.addListener(
  logOnDOMContentLoaded,
  filter,
);