How to Add Lazyload Images in Blogger ? Step by Step

You can improve your site speed by using this lazyload script. After using the lazy load script, you can increase the speed of your blog by 20-30%
How to Add Lazyload Images in Blogger

If you want to improve the loading speed of your website or blog, then this post can be very useful for you. Often you will be checking the speed of your website in Google PageSpeed Insights, Web.dev or GtMetrix, then you will often see problems related to image loading. Can't it be improved? Yes, it can be solved by lazy loading the images.

Let us tell you that there are already many posts on this topic on the internet but some of them don't like the script or you don't like the features given in some scripts. The script also has a great smooth animation with lazy load.

The script we have shared does not work automatically. You need to update the conditional tags given in the template to lazy load the image, then it will work properly. Do not use it in the image inside the post, otherwise you may have trouble getting the images ranked in google.

What is Lazyload Images ?

Lazyload mainly loads 2 images instantly out of all the images you see on your blog. After that, as the user scrolls down, the entire image is loaded slowly.

In this way it does not become a burden on the speed of your blog. You can improve your site speed by using this lazyload script. After using the lazy load script, you can increase the speed of your blog by 20-30%, plus you will notice that you no longer need to load images in Google PageSpeed Insights, Web.dev or GtMetrix The problem will not appear.

How to Add Lazyload Images in Blogger

  1. First Login Your Blogger Account.
  2. Then Select Theme Menu.
  3. Then Click on Edit Html.
  4. Copy the Css Code Below and Then Paste it Before </head>.
  5. <style type='text/css'>
    /*-- Lazyload Css By Www.Two9Success.Com  --*/
    .lazyload,.lazyloading{opacity:.3;-webkit-animation-duration:1.25s;animation-duration:1.25s;-webkit-animation-fill-mode:forwards;animation-fill-mode:forwards;-webkit-animation-iteration-count:infinite;animation-iteration-count:infinite;-webkit-animation-name:placeHolderShimmer;animation-name:placeHolderShimmer;-webkit-animation-timing-function:ease-in-out;animation-timing-function:ease-in-out;background:#d7dee0;background:-webkit-gradient(linear,left top,right top,color-stop(10%,#d7dee0),color-stop(18%,#c8cecf),color-stop(33%,#d7dee0));background:linear-gradient(to right,#d7dee0 10%,#c8cecf 18%,#d7dee0 33%);background-size:200% 100%!important;-webkit-transition:opacity .2s ease-in-out;transition:opacity .2s ease-in-out}
    .lazyloaded{opacity:1}
    @-webkit-keyframes placeHolderShimmer{0{background-position:100% 0}100%{background-position:-100% 0}}
    @keyframes placeHolderShimmer{0{background-position:100% 0}100%{background-position:-100% 0}}
    </style>
  6. Copy the JavaScript Code Below and Then Paste it Before </body>.
  7. <script type='text/javascript'>
    //<![CDATA[
    /*-- Lazyload JavaScript By Www.Two9Success.Com  --*/
    !function(a,b){var c=b(a,a.document);a.lazySizes=c,"object"==typeof module&&module.exports&&(module.exports=c)}(window,function(a,b){"use strict";if(b.getElementsByClassName){var c,d,e=b.documentElement,f=a.Date,g=a.HTMLPictureElement,h="addEventListener",i="getAttribute",j=a[h],k=a.setTimeout,l=a.requestAnimationFrame||k,m=a.requestIdleCallback,n=/^picture$/i,o=["load","error","lazyincluded","_lazyloaded"],p={},q=Array.prototype.forEach,r=function(a,b){return p[b]||(p[b]=new RegExp("(\\s|^)"+b+"(\\s|$)")),p[b].test(a[i]("class")||"")&&p[b]},s=function(a,b){r(a,b)||a.setAttribute("class",(a[i]("class")||"").trim()+" "+b)},t=function(a,b){var c;(c=r(a,b))&&a.setAttribute("class",(a[i]("class")||"").replace(c," "))},u=function(a,b,c){var d=c?h:"removeEventListener";c&&u(a,b),o.forEach(function(c){a[d](c,b)})},v=function(a,d,e,f,g){var h=b.createEvent("Event");return e||(e={}),e.instance=c,h.initEvent(d,!f,!g),h.detail=e,a.dispatchEvent(h),h},w=function(b,c){var e;!g&&(e=a.picturefill||d.pf)?(c&&c.src&&!b[i]("srcset")&&b.setAttribute("srcset",c.src),e({reevaluate:!0,elements:[b]})):c&&c.src&&(b.src=c.src)},x=function(a,b){return(getComputedStyle(a,null)||{})[b]},y=function(a,b,c){for(c=c||a.offsetWidth;c<d.minSize&&b&&!a._lazysizesWidth;)c=b.offsetWidth,b=b.parentNode;return c},z=function(){var a,c,d=[],e=[],f=d,g=function(){var b=f;for(f=d.length?e:d,a=!0,c=!1;b.length;)b.shift()();a=!1},h=function(d,e){a&&!e?d.apply(this,arguments):(f.push(d),c||(c=!0,(b.hidden?k:l)(g)))};return h._lsFlush=g,h}(),A=function(a,b){return b?function(){z(a)}:function(){var b=this,c=arguments;z(function(){a.apply(b,c)})}},B=function(a){var b,c=0,e=d.throttleDelay,g=d.ricTimeout,h=function(){b=!1,c=f.now(),a()},i=m&&g>49?function(){m(h,{timeout:g}),g!==d.ricTimeout&&(g=d.ricTimeout)}:A(function(){k(h)},!0);return function(a){var d;(a=!0===a)&&(g=33),b||(b=!0,d=e-(f.now()-c),d<0&&(d=0),a||d<9?i():k(i,d))}},C=function(a){var b,c,d=99,e=function(){b=null,a()},g=function(){var a=f.now()-c;a<d?k(g,d-a):(m||e)(e)};return function(){c=f.now(),b||(b=k(g,d))}};!function(){var b,c={lazyClass:"lazyload",loadedClass:"lazyloaded",loadingClass:"lazyloading",preloadClass:"lazypreload",errorClass:"lazyerror",autosizesClass:"lazyautosizes",srcAttr:"data-src",srcsetAttr:"data-srcset",sizesAttr:"data-sizes",minSize:40,customMedia:{},init:!0,expFactor:1.5,hFac:.8,loadMode:2,loadHidden:!0,ricTimeout:0,throttleDelay:125};d=a.lazySizesConfig||a.lazysizesConfig||{};for(b in c)b in d||(d[b]=c[b]);a.lazySizesConfig=d,k(function(){d.init&&F()})}();var D=function(){var g,l,m,o,p,y,D,F,G,H,I,J,K=/^img$/i,L=/^iframe$/i,M="onscroll"in a&&!/(gle|ing)bot/.test(navigator.userAgent),N=0,O=0,P=0,Q=-1,R=function(a){P--,(!a||P<0||!a.target)&&(P=0)},S=function(a){return null==J&&(J="hidden"==x(b.body,"visibility")),J||"hidden"!=x(a.parentNode,"visibility")&&"hidden"!=x(a,"visibility")},T=function(a,c){var d,f=a,g=S(a);for(F-=c,I+=c,G-=c,H+=c;g&&(f=f.offsetParent)&&f!=b.body&&f!=e;)(g=(x(f,"opacity")||1)>0)&&"visible"!=x(f,"overflow")&&(d=f.getBoundingClientRect(),g=H>d.left&&G<d.right&&I>d.top-1&&F<d.bottom+1);return g},U=function(){var a,f,h,j,k,m,n,p,q,r,s,t,u=c.elements;if((o=d.loadMode)&&P<8&&(a=u.length)){for(f=0,Q++,r=!d.expand||d.expand<1?e.clientHeight>500&&e.clientWidth>500?500:370:d.expand,c._defEx=r,s=r*d.expFactor,t=d.hFac,J=null,O<s&&P<1&&Q>2&&o>2&&!b.hidden?(O=s,Q=0):O=o>1&&Q>1&&P<6?r:N;f<a;f++)if(u[f]&&!u[f]._lazyRace)if(M)if((p=u[f][i]("data-expand"))&&(m=1*p)||(m=O),q!==m&&(y=innerWidth+m*t,D=innerHeight+m,n=-1*m,q=m),h=u[f].getBoundingClientRect(),(I=h.bottom)>=n&&(F=h.top)<=D&&(H=h.right)>=n*t&&(G=h.left)<=y&&(I||H||G||F)&&(d.loadHidden||S(u[f]))&&(l&&P<3&&!p&&(o<3||Q<4)||T(u[f],m))){if(aa(u[f]),k=!0,P>9)break}else!k&&l&&!j&&P<4&&Q<4&&o>2&&(g[0]||d.preloadAfterLoad)&&(g[0]||!p&&(I||H||G||F||"auto"!=u[f][i](d.sizesAttr)))&&(j=g[0]||u[f]);else aa(u[f]);j&&!k&&aa(j)}},V=B(U),W=function(a){var b=a.target;if(b._lazyCache)return void delete b._lazyCache;R(a),s(b,d.loadedClass),t(b,d.loadingClass),u(b,Y),v(b,"lazyloaded")},X=A(W),Y=function(a){X({target:a.target})},Z=function(a,b){try{a.contentWindow.location.replace(b)}catch(c){a.src=b}},$=function(a){var b,c=a[i](d.srcsetAttr);(b=d.customMedia[a[i]("data-media")||a[i]("media")])&&a.setAttribute("media",b),c&&a.setAttribute("srcset",c)},_=A(function(a,b,c,e,f){var g,h,j,l,o,p;(o=v(a,"lazybeforeunveil",b)).defaultPrevented||(e&&(c?s(a,d.autosizesClass):a.setAttribute("sizes",e)),h=a[i](d.srcsetAttr),g=a[i](d.srcAttr),f&&(j=a.parentNode,l=j&&n.test(j.nodeName||"")),p=b.firesLoad||"src"in a&&(h||g||l),o={target:a},s(a,d.loadingClass),p&&(clearTimeout(m),m=k(R,2500),u(a,Y,!0)),l&&q.call(j.getElementsByTagName("source"),$),h?a.setAttribute("srcset",h):g&&!l&&(L.test(a.nodeName)?Z(a,g):a.src=g),f&&(h||l)&&w(a,{src:g})),a._lazyRace&&delete a._lazyRace,t(a,d.lazyClass),z(function(){var b=a.complete&&a.naturalWidth>1;p&&!b||(b&&s(a,"ls-is-cached"),W(o),a._lazyCache=!0,k(function(){"_lazyCache"in a&&delete a._lazyCache},9))},!0)}),aa=function(a){var b,c=K.test(a.nodeName),e=c&&(a[i](d.sizesAttr)||a[i]("sizes")),f="auto"==e;(!f&&l||!c||!a[i]("src")&&!a.srcset||a.complete||r(a,d.errorClass)||!r(a,d.lazyClass))&&(b=v(a,"lazyunveilread").detail,f&&E.updateElem(a,!0,a.offsetWidth),a._lazyRace=!0,P++,_(a,b,f,e,c))},ba=function(){if(!l){if(f.now()-p<999)return void k(ba,999);var a=C(function(){d.loadMode=3,V()});l=!0,d.loadMode=3,V(),j("scroll",function(){3==d.loadMode&&(d.loadMode=2),a()},!0)}};return{_:function(){p=f.now(),c.elements=b.getElementsByClassName(d.lazyClass),g=b.getElementsByClassName(d.lazyClass+" "+d.preloadClass),j("scroll",V,!0),j("resize",V,!0),a.MutationObserver?new MutationObserver(V).observe(e,{childList:!0,subtree:!0,attributes:!0}):(e[h]("DOMNodeInserted",V,!0),e[h]("DOMAttrModified",V,!0),setInterval(V,999)),j("hashchange",V,!0),["focus","mouseover","click","load","transitionend","animationend","webkitAnimationEnd"].forEach(function(a){b[h](a,V,!0)}),/d$|^c/.test(b.readyState)?ba():(j("load",ba),b[h]("DOMContentLoaded",V),k(ba,2e4)),c.elements.length?(U(),z._lsFlush()):V()},checkElems:V,unveil:aa}}(),E=function(){var a,c=A(function(a,b,c,d){var e,f,g;if(a._lazysizesWidth=d,d+="px",a.setAttribute("sizes",d),n.test(b.nodeName||""))for(e=b.getElementsByTagName("source"),f=0,g=e.length;f<g;f++)e[f].setAttribute("sizes",d);c.detail.dataAttr||w(a,c.detail)}),e=function(a,b,d){var e,f=a.parentNode;f&&(d=y(a,f,d),e=v(a,"lazybeforesizes",{width:d,dataAttr:!!b}),e.defaultPrevented||(d=e.detail.width)&&d!==a._lazysizesWidth&&c(a,f,e,d))},f=function(){var b,c=a.length;if(c)for(b=0;b<c;b++)e(a[b])},g=C(f);return{_:function(){a=b.getElementsByClassName(d.autosizesClass),j("resize",g)},checkElems:g,updateElem:e}}(),F=function(){F.i||(F.i=!0,E._(),D._())};return c={cfg:d,autoSizer:E,loader:D,init:F,uP:w,aC:s,rC:t,hC:r,fire:v,gW:y,rAF:z}}});window.lazySizesConfig=window.lazySizesConfig||{},window.lazySizesConfig.rias=window.lazySizesConfig.rias||{prefix:"",absUrl:!0},window.lazySizesConfig.expand=9;
    //]]>
    </script>
  8. Then use <img> tag like this:
  9. <img class='lazyload' data-src='Image_url' src='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAJCAYAAAA7KqwyAAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAAAD6AAAA+gBtXtSawAAABl0RVh0U29mdHdhcmUAd3d3Lmlua3NjYXBlLm9yZ5vuPBoAAAAYSURBVCiRY0xISOBgoAAwUaJ51IBhYwAAuQABOsYCprwAAAAASUVORK5CYII='/>

    Add lazyload Class on <img> Tag Like: class='lazyload' .

    Replace src Attribute to data-src.

    Add This New Code Under <img> Tag:

    src='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAJCAYAAAA7KqwyAAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAAAD6AAAA+gBtXtSawAAABl0RVh0U29mdHdhcmUAd3d3Lmlua3NjYXBlLm9yZ5vuPBoAAAAYSURBVCiRY0xISOBgoAAwUaJ51IBhYwAAuQABOsYCprwAAAAASUVORK5CYII='
  10. Finally, Don't Forget To Click on Save Theme And Then See The Result.

Conclusion :-

In this post we explained how to lazy load images on blogger. By using this method, you can increase the speed of your website to a great extent. Do comment if you face any problem using lazy load image script. Thank You.

Source:
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1 comment

  1. Sunny Technical Point