Offshore And Outsource jQuery Developers
Offshore and Outsource jQuery Developers: Transform Your Front-End Development A website that is both interesting and easy to use is essential for success in the digital-first world of today. A cro
Read More
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
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;
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;
}
}
img.src = src;
}
function elementInViewport(el) {
var rect = el.getBoundingClientRect()
var rect = el.getBoundingClientRect()
return (
rect.top >= 0
&& rect.left >= 0
&& rect.top <= (window.innerHeight || document.documentElement.clientHeight)
)
}
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]);
};
, 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);
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.
+91 ▼ Related Posts
O
The Ultimate Guide to Facebook Ads Management
In today’s digital-first world, Facebook remains a powerhouse for connecting businesses with their target audiences. Effective Facebook Ads Management is key to leveraging this platform to grow
Read More
How to read or detect text from image using Google Vision API
In this blog post, i will be able to allow you to skills to read content of images with Google Vision API. Google Vision API can easily detect and extract text from a picture . There are two annota
Read More