GlobalEventHandlers.onloadend

img.onloadend = funcRef;

funcRef是在事件源的loadend事件触发时要调用的处理函数。

<img src="myImage.jpg">

// 'loadstart' fires first, then 'load', then 'loadend'

image.addEventListener('load', function(e) {
  console.log('Image loaded');
});

image.addEventListener('loadstart', function(e) {
  console.log('Image load started');
});

image.addEventListener('loadend', function(e) {
  console.log('Image load finished');
});