ADD: lazyload image [2].

scripts/tags/lazy-image

@@ -0,0 +1,26 @@
+/* global hexo */
+// Usage: {% lazyimage /path/to/image, alt, title %}
+// Alias: {% li /path/to/image, alt, title %}
+
+function lazyImage(args) {
+  args = args.join(' ').split(',');
+  var src = args[0];
+  var alt = args[1] || '';
+  var title = args[2] || '';
+
+  if (!src) {
+    hexo.log.warn('Image src can NOT be empty');
+  }
+  alt = alt.trim();
+  title = title.trim();
+
+  var image = ['<span itemprop="image" itemscope itemtype="http://schema.org/ImageObject"><img itemprop="url image" src="/images/loading.gif" data-original="' + src + '" class="full-image"'];
+  alt.length > 0 && image.push('alt="' + alt + '"');
+  title.length > 0 && image.push('title="' + title + '"');
+  image.push('/><meta itemprop="width" content="auto"><meta itemprop="height" content="auto"></span>');
+
+  return image.join(' ');
+}
+
+hexo.extend.tag.register('lazyimage', lazyImage);
+hexo.extend.tag.register('li', lazyImage);