cordova - addEventListener方法最后的true和false是什么意思

Question

这是 Phonegap addEventListener 方法的示例

document.addEventListener("deviceready", onDeviceReady, false);

任何人都可以向我解释什么是假的，或者有时最后是真的。

还有一件事..

navigator.accelerometer.getCurrentAcceleration(onSuccess, onError);

上面的例子说，如果他成功获得当前加速度，则触发 onSuccess 函数，如果没有则触发 onError 函数……对吗？我对加速示例的看法是否正确，请向我解释 addEventListener false 和 true 的含义，非常感谢。

Answer 1

在提问之前谷歌搜索时，您会惊讶地发现...

useCapture Optional
If true, useCapture indicates that the user wishes to initiate capture. After initiating capture, all events of the specified type will be dispatched to the registered listener before being dispatched to any EventTarget beneath it in the DOM tree. Events which are bubbling upward through the tree will not trigger a listener designated to use capture. See DOM Level 3 Events for a detailed explanation. If not specified, useCapture defaults to false. Note: useCapture became optional only in more recent versions of the major browsers; for example, it was not optional prior to Firefox 6. You should provide this parameter for broadest compatibility.

developer.mozilla.org documentation

Required. Boolean that specifies whether the event needs to be captured or not.

Full documentation