HTML DOM ProgressEvent

ProgressEvent 对象

ProgressEvent 对象处理加载外部资源时发生的事件。

Event	Occurs When
onerror	An error occurs while loading an external file
onloadstart	The browser starts looking for the specified file

Property	Returns
lengthComputable	If the length of the progress can be computable or not
loaded	How much work has been loaded
total	The total amount that will be loaded

ProgressEvent 继承了以下所有属性和方法：