diff options
Diffstat (limited to 'lib/banzai/filter/image_lazy_load_filter.rb')
| -rw-r--r-- | lib/banzai/filter/image_lazy_load_filter.rb | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/banzai/filter/image_lazy_load_filter.rb b/lib/banzai/filter/image_lazy_load_filter.rb new file mode 100644 index 00000000000..7a81d583b82 --- /dev/null +++ b/lib/banzai/filter/image_lazy_load_filter.rb @@ -0,0 +1,16 @@ +module Banzai + module Filter + # HTML filter that moves the value of the src attribute to the data-src attribute so it can be lazy loaded + class ImageLazyLoadFilter < HTML::Pipeline::Filter + def call + doc.xpath('descendant-or-self::img').each do |img| + img['class'] ||= '' << 'lazy' + img['data-src'] = img['src'] + img['src'] = LazyImageTagHelper.placeholder_image + end + + doc + end + end + end +end |