blob: ac987a04895f428c9911fdc2260c16036de42b50 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
# frozen_string_literal: true
module LazyImageTagHelper
def placeholder_image
"data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="
end
# Override the default ActionView `image_tag` helper to support lazy-loading
def image_tag(source, options = {})
options = options.symbolize_keys
unless options.delete(:lazy) == false
options[:data] ||= {}
options[:data][:src] = path_to_image(source)
# options[:class] can be either String or Array.
klass_opts = Array.wrap(options[:class])
klass_opts << "lazy"
options[:class] = klass_opts.join(' ')
source = placeholder_image
end
super(source, options)
end
# Required for Banzai::Filter::ImageLazyLoadFilter
module_function :placeholder_image
end
|
