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This project integrates the jQuery Lazy Load Plugin
for Rails image_tag
helpers
From the project page:
Lazy Load is a jQuery plugin written in JavaScript. It delays loading of images in long web pages. Images outside of viewport (visible part of web page) won't be loaded before user scrolls to them. This is opposite of image preloading.
Using Lazy Load on long web pages containing many large images makes the page load faster. Browser will be in ready state after loading visible images. In some cases it can also help to reduce server load.
See example (scroll down to see images load)
lazy: true
option to Rails image_tag
helpers to render lazyload-friendly img tags.<%= image_tag "kittenz.png", lazy: true %>
or
# config/initializers/lazyload.rb
Lazyload::Rails.configure do |config|
config.lazy_by_default = true
end
<%= image_tag "kittenz.png" %>
Equals:
<img src="data:image/gif;base64,R0lGODdhAQABAPAAAMPDwwAAACwAAAAAAQABAAACAkQBADs="
data-original="/images/kittenz.png" />
PRO TIP! You must set image dimensions either as width and height attributes or in CSS. Otherwise plugin might not work properly.
Add this line to your application's Gemfile:
gem "lazyload-rails"
Download the jQuery Lazy Load Plugin
into your vendor/assets/javascripts
directory.
Include it however you prefer. For example, in your application.js you could add:
//= require jquery.lazyload
In your JavaScript code do:
$("img").lazyload();
Lazy Load can be customized, see more options
Important: Remember that the Lazy Load Plugin depends on jQuery.
# config/initializers/lazyload.rb
Lazyload::Rails.configure do |config|
# By default, a 1x1 grey gif is used as placeholder ("data:image/gif;base64,...").
# This can be easily customized:
config.placeholder = "/public/img/grey.gif"
# image_tag can return lazyload-friendly images by default,
# no need to pass the { lazy: true } option
config.lazy_by_default = true
end
Lazyload-Rails is released under the MIT License.
FAQs
Unknown package
We found that lazyload-rails demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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