懒图片 / LazyImg

<button id="alert">
  点我显示警告
</button>

require(['jquery', 'moye/LazyImg'], function ($, LazyImg) {

  var html = ['<div class="content"><div class="lazy-img">'];
  var img1 = 'https://tb2.bdstatic.com/tb/static-common/img/search_logo_039c9b99.png';
  var img2 = 'https://www.baidu.com/img/bdlogo.gif';
  
  for (var i = 0; i < 100; i++ ) {
    html.push('<img src="' + img1 + '" _src="' + img2 + '?_t=' + (i) + '" />');
  }
  
  html.push('</div></div>');

  document.write(html.join(''));
  
  LazyImg.load({
    offset: {
      y: 1250
    }
  });
  
});