Related Post Blogger Support WEBP

Related Post Blogger Support WEBP



Related Blogger Post Support WEBP - After the previous post we got a solution for Blogger thumbnails to support WEBP image format, now then we will make related posts also support WEBP.

Because in related posts we also display thumbnail images as well, so this also causes problems when checked in Pagespeed Insights and Lighthouse, namely the problem of Serve images in next-gen formats and Defer offscreen images.

One related post that I use is a related post made by mas Taufik from DTE because it is easy to modify.

For that, we will slightly modify the related post so as not to cause problems in Pagespeed Insights and Lighthouse with the use of WEBP images and lazyload.

Like thumbnails of Bloggers who support WEBP , we also use Statically Imgpx to change Blogger images in related posts to support WEBP and by using Lazysizes.js to change the URL of the image as well as to lazyload the image.

For the demo, you can check the following demo blog, please try to save the image in the related post using Google Chrome, then the image will be saved in WEBP format.

If you want to try it, please use the following codes.

This is the related post code from DTE which I modified a bit to use the picture tag for the thumbnail.

  /*! Related Post Widget for Blogger by Taufik Nurrohman => http://gplus.to/tovic */
var randomRelatedIndex,showRelatedPost;(function(n,m,k){var d={widgetTitle:"",widgetStyle:1,homePage:"https://kompitext.blogspot.com/",numPosts:6,summaryLength:370,titleLength:"auto",thumbnailSize:300,noImage:"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAAA3NCSVQICAjb4U/gAAAADElEQVQImWOor68HAAL+AX7vOF2TAAAAAElFTkSuQmCC",containerId:"related-post",newTabLink:false,moreText:"Baca Selengkapnya",callBack:function(){}};for(var f in relatedPostConfig){d[f]=(relatedPostConfig[f]=="undefined")?d[f]:relatedPostConfig[f]}var j=function(a){var b=m.createElement("script");b.type="text/javascript";b.src=a;k.appendChild(b)},o=function(b,a){return Math.floor(Math.random()*(a-b+1))+b},l=function(a){var p=a.length,c,b;if(p===0){return false}while(--p){c=Math.floor(Math.random()*(p+1));b=a[p];a[p]=a[c];a[c]=b}return a},e=(typeof labelArray=="object"&&labelArray.length>0)?"/-/"+l(labelArray)[0]:"",h=function(b){var c=b.feed.openSearch$totalResults.$t-d.numPosts,a=o(1,(c>0?c:1));j(d.homePage.replace(//$/,"")+"/feeds/posts/summary"+e+"?alt=json-in-script&orderby=updated&start-index="+a+"&max-results="+d.numPosts+"&callback=showRelatedPost")},g=function(z){var s=document.getElementById(d.containerId),x=l(z.feed.entry),A=d.widgetStyle,c=d.widgetTitle+'<ul class="related-post-style-'+A+'">',b=d.newTabLink?' target="_blank"':"",y='<span style="display:block;clear:both;"></span>',v,t,w,r,u;if(!s){return}for(var q=0;q<d.numPosts;q++){if(q==x.length){break}t=x[q].title.$t;w=(d.titleLength!=="auto"&&d.titleLength<t.length)?t.substring(0,d.titleLength)+"&hellip;":t;r=("media$thumbnail"in x[q]&&d.thumbnailSize!==false)?x[q].media$thumbnail.url.replace(//s[0-9]+(-c)?/, "/s"+d.thumbnailSize+""):d.noImage;u=("summary"in x[q]&&d.summaryLength>0)?x[q].summary.$t.replace(/<br ?/?>/g," ").replace(/<.*?>/g,"").replace(/[<>]/g,"").substring(0,d.summaryLength)+"&hellip;":"";for(var p=0,a=x[q].link.length;p<a;p++){v=(x[q].link[p].rel=="alternate")?x[q].link[p].href:"#"}if(A==2){c+='<li><a href="'+v+'" title="'+t+'"'+b+' target="_blank"><div class="related-post-item-thumbnail">
<picture><source data-srcset="'+r+'?format=webp" type="image/webp"/><source data-srcset="'+r+'" type="image/jpg"/><img alt="" class="related-post-item-thumbnail lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAJAQMAAAAB5D5xAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjwA0AABsAAQrj5HwAAAAASUVORK5CYII=" data-src="'+r+'" width="'+d.thumbnailSize+'" height="'+d.thumbnailSize+'"></picture></div></a><a class="related-post-item-title" title="'+t+'" href="'+v+'"'+b+" target='_blank'>"+w+'</a><span class="related-post-item-summary"><span class="related-post-item-summary-text">'+u+'</span> <a href="'+v+'" class="related-post-item-more"'+b+">"+d.moreText+"</a></span>"+y+"</li>"}else{if(A==3||A==4){c+='<li class="related-post-item" tabindex="0"><a class="related-post-item-title" href="'+v+'"'+b+' target="_blank"><img alt="" class="related-post-item-thumbnail" src="'+r+'" width="'+d.thumbnailSize+'" height="'+d.thumbnailSize+'"></a><div class="related-post-item-tooltip"><a class="related-post-item-title" title="'+t+'" href="'+v+'"'+b+" target='_blank'>"+w+"</a></div>"+y+"</li>"}else{if(A==5){c+='<li class="related-post-item" tabindex="0"><a class="related-post-item-wrapper" href="'+v+'" title="'+t+'"'+b+' target="_blank"><img alt="" class="related-post-item-thumbnail" src="'+r+'" width="'+d.thumbnailSize+'" height="'+d.thumbnailSize+'"><span class="related-post-item-tooltip">'+w+"</span></a>"+y+"</li>"}else{if(A==6){c+='<li><a class="related-post-item-title" title="'+t+'" href="'+v+'"'+b+" target='_blank'>"+w+'</a><div class="related-post-item-tooltip"><img alt="" class="related-post-item-thumbnail" src="'+r+'" width="'+d.thumbnailSize+'" height="'+d.thumbnailSize+'"><span class="related-post-item-summary"><span class="related-post-item-summary-text">'+u+"</span></span>"+y+"</div></li>"}else{c+='<li><a title="'+t+'" href="'+v+'"'+b+" target='_blank'>"+w+"</a></li>"}}}}}s.innerHTML=c+="</ul>"+y;d.callBack()};randomRelatedIndex=h;showRelatedPost=g;j(d.homePage.replace(//$/,"")+"/feeds/posts/summary"+e+"?alt=json-in-script&orderby=updated&max-results=0&callback=randomRelatedIndex")})(window,document,document.getElementsByTagName("head")[0]);

Then also use the following lazysizes.js script, if you have previously followed the way for the Blogger support WEBP thumbnail in the previous post then you do not need to add this lazysizes.js script again.

  /*! lazysizes - v5.1.0 */
!function(a,b){var c=b(a,a.document);a.lazySizes=c,"object"==typeof module&&module.exports&&(module.exports=c)}("undefined"!=typeof window?window:{},function(a,b){"use strict";var c,d;if(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])}(),!b||!b.getElementsByClassName)return{init:function(){},cfg:d,noSupport:!0};var 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))}},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++;f<a;f++)if(u[f]&&!u[f]._lazyRace)if(!M||c.prematureUnveil&&c.prematureUnveil(u[f]))aa(u[f]);else if((p=u[f][i]("data-expand"))&&(m=1*p)||(m=O),r||(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),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]);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}},$=function(a){var b,c=a[i](d.srcsetAttr).replace(/.*?:///g,"https://cdn.statically.io/img/");(b=d.customMedia[a[i]("data-media")||a[i]("media")])&&a.setAttribute("media",b),c&&a.setAttribute("srcset",c)},_=A(function(a,b,c,e,f){var g,h,j,l,o,p;(o=v(a,"lazybeforeunveil",b)).defaultPrevented||(e&&(c?s(a,d.autosizesClass):a.setAttribute("sizes",e)),h=a[i](d.srcsetAttr),g=a[i](d.srcAttr).replace(/.*?:///g,"//"),f&&(j=a.parentNode,l=j&&n.test(j.nodeName||"")),p=b.firesLoad||"src"in a&&(h||g||l),o={target:a},s(a,d.loadingClass),p&&(clearTimeout(m),m=k(R,2500),u(a,Y,!0)),l&&q.call(j.getElementsByTagName("source"),$),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)),"lazy"==a.loading&&P--},!0)}),aa=function(a){if(!a._lazyRace){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=C(function(){d.loadMode=3,V()}),ca=function(){3==d.loadMode&&(d.loadMode=2),ba()},da=function(){if(!l){if(f.now()-p<999)return void k(da,999);l=!0,d.loadMode=3,V(),j("scroll",ca,!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"].forEach(function(a){b[h](a,V,!0)}),/d$|^c/.test(b.readyState)?da():(j("load",da),b[h]("DOMContentLoaded",V),k(da,2e4)),c.elements.length?(U(),z._lsFlush()):V()},checkElems:V,unveil:aa,_aLSL:ca}}(),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&&b.getElementsByClassName&&(F.i=!0,E._(),D._())};return k(function(){d.init&&F()}),c={cfg:d,autoSizer:E,loader:D,init:F,uP:w,aC:s,rC:t,hC:r,fire:v,gW:y,rAF:z}});

Then use the following code to display the related post.

  <b:if cond='data:blog.pageType == &quot;item&quot;'>
<div class='related-wrapper'>
<h4>You Might Also Like:</h4>
  <div class='related-post' id='related-post'/>
</div>
  <script>
  var labelArray = [<b:if cond='data:post.labels'><b:loop values='data:post.labels' var='label'>
          &quot;<data:label.name/>&quot;<b:if cond='data:label.isLast != &quot;true&quot;'>,</b:if>
      </b:loop></b:if>];
  var relatedPostConfig = {
      homePage: &quot;<data:blog.homepageUrl/>&quot;,
      numPosts:6,
      thumbnailSize:138,
      widgetStyle:2,
      callBack: function() {}
  };
  </script>
</b:if>

And here is the CSS code to set the display of the related post.

  /* Related Posts */
.related-wrapper h4{margin:10px 0;font-size:20px;font-weight:500;padding:0;color:#333}
.related-post{margin:10px 0 0;overflow:hidden}
.related-post-style-2{margin:0;padding:0;list-style:none}
.related-post-style-2 li{width:100%;height:78px;display:block;padding:0;float:none;overflow:hidden;margin:0 0 10px;list-style:none}
.related-post-style-2 li:last-child{margin:0}
.related-post li a{color:#C51162;}
.related-post-style-2 li a:hover{color:#777}
.related-post-style-2 .related-post-item-thumbnail{width:138px;height:78px;max-width:none;max-height:none;background-color:transparent;border:none;padding:0;float:left;margin:0 8px 0 0;transition:all .4s ease-in-out;position:relative}
.related-post-style-2 .related-post-item-thumbnail img{width:100%;height:100%;max-width:none;max-height:none;background-color:transparent;border:none;display:block}
.related-post-style-2 .related-post-item-title{font-weight:500;padding-right:0;display:block;display:-webkit-box;margin-bottom:5px;line-height:1.1;font-size:90%!important}
.related-post-item-summary{display:none}

With CSS above, the related post display will look like a demo or as shown below. You can change the appearance in the CSS above.

May be useful.


Related Post Blogger Support WEBP

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