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 Mr 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 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)+"…":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)+"…":"";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 */
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Then use the following code to display the related post.
<b:if cond='data:blog.pageType == "item"'>
<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'>
"<data:label.name/>"<b:if cond='data:label.isLast != "true"'>,</b:if>
</b:loop></b:if>];
var relatedPostConfig = {
homePage: "<data:blog.homepageUrl/>",
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.