blob: 916c135b7770e998b5e9391324dd6865efaa3fcf (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
# frozen_string_literal: true
# Generated HTML is transformed back to GFM by app/assets/javascripts/behaviors/markdown/nodes/image.js
module Banzai
module Filter
# HTML filter that moves the value of image `src` attributes to `data-src`
# so they can be lazy loaded.
class ImageLazyLoadFilter < HTML::Pipeline::Filter
CSS = 'img'
XPATH = Gitlab::Utils::Nokogiri.css_to_xpath(CSS).freeze
def call
doc.xpath(XPATH).each do |img|
img.add_class('lazy')
img['data-src'] = img['src']
img['src'] = LazyImageTagHelper.placeholder_image
end
doc
end
end
end
end
|