Lazy load Images Using jQuery / JavaScript

Breadcrumb Breadcrumb
Lazy load Images Using jQuery / JavaScript

Lazy load Images Using jQuery / JavaScript

lazy load images using jquery

Lazy Load is a jQuery script written in JavaScript. It delays the loading of images on long web pages. All the images are loaded one by one while the page is getting scrolled. Images outside of viewport visible part of a web page won't be loaded before user scrolls to them.

Replace image src with blank image and add image source in data-src

lazy load images using jquery


Add this Javascript function in footer of the page this simple script helps in lazy loading of image

function loadImage (el, fn) {
    var img = new Image()
      , src = el.getAttribute('data-src');
    img.onload = function() {
      if (!! el.parent)
        el.parent.replaceChild(img, el)
      else
        el.src = src;
      fn? fn() : null;
    }
    img.src = src;
  }
  function elementInViewport(el) {
    var rect = el.getBoundingClientRect()
    return (
       rect.top    >= 0
    && rect.left   >= 0
    && rect.top <= (window.innerHeight || document.documentElement.clientHeight)
    )
  }
    var images = new Array()
      , query = $q('img.lazy')
      , processScroll = function(){
          for (var i = 0; i < images.length; i++) {
            if (elementInViewport(images[i])) {
              loadImage(images[i], function () {
                images.splice(i, i);
              });
            }
          };
        }
      ;
    // Array.prototype.slice.call is not callable under our old browsers 
    for (var i = 0; i < query.length; i++) {
      images.push(query[i]);
    };
    processScroll();
    addEventListener('scroll',processScroll);
}(this)

The above Javascript function will help you to load images slow when the pages is scrolled. this will help webpage to load fast and prevent may HTTP request. page speed with be increased. 
           

Confused about your business model?

Request a FREE Business Plan.

India +91 ▼

Tags

  • lazy load images jquery codepen

  • lazyload jquery example

  • lazy load images example

  • lazy loading content on scroll jquery
  • lazyload w3school

  • lazy loading javascript on a scroll

  • load images after page load

  • lazyload background images

Related Posts

The Importance of Alumni Management Software in 2025: Building Stronger Alumni Networks
Alumni | Software Development |

The Importance of Alumni Management Software in 2025: Building Stronger Alumni Networks

Alumni networks are especially important in determining the standing and expansion of educational institutions in the hyperconnected world of today. A strong alumni network may have a big impact on an

Read More
W
eCommerce |

Website Redesign fresh coat of paint for your business

Adding a fresh coat of paint to something that is old, outdated or weather-worn is a great way to bring an object back to life and make it useful again. But when it comes to refreshing your website, i

Read More
Hire Shopify Experts & Developers In India
Hire Us | eCommerce |

Hire Shopify Experts & Developers In India

Blazingcoders: Your Trusted Shopify Development Partner In the cutthroat world of e-commerce, having a strong, feature-rich, and aesthetically pleasing store is essential. Shopify is one of the bes

Read More