Firefox扩展.DOMContentLoaded在某些页面上多次触发

Question

window.addEventListener('load', function () {
gBrowser.addEventListener('DOMContentLoaded', function () {
    // stuff that happens for each web page load goes here
}, false),false)

我对此代码有以下问题:DOMContentLoaded在某些页面上多次触发.

Answer 1

DOMContentLoaded也将为iframe调用.如果您想忽略这些调用,可以执行以下操作:

function onLoaded(event) {
  var isFrame = (event.target instanceof Ci.nsIDOMHTMLDocument &&
    event.target != browser.contentDocument);
  if (isFrame) {
    return;
  }
}