If I'm using a third party app that only allows me to add snippets of code.

[raphael1807]

Hey y'all. I would say that I am a pretty beginner dev. Here is my question. The company where I am we're using a third party app that only allows us to add some javascript in the head of the html file.

1. So I would add this bunch of code between script tags:

<script> !function(e){var t=function(u,D,f){"use strict";var k,H;if(function(){var e;var t={lazyClass:"lazyload",loadedClass:"lazyloaded",loadingClass:"lazyloading",preloadClass:"lazypreload",errorClass:"lazyerror",autosizesClass:"lazyautosizes",fastLoadedClass:"ls-is-cached",iframeLoadMode:0,srcAttr:"data-src",srcsetAttr:"data-srcset",sizesAttr:"data-sizes",minSize:40,customMedia:{},init:true,expFactor:1.5,hFac:.8,loadMode:2,loadHidden:true,ricTimeout:0,throttleDelay:125};H=u.lazySizesConfig||u.lazysizesConfig||{};for(e in t){if(!(e in H)){H[e]=t[e]}}}(),!D||!D.getElementsByClassName){return{init:function(){},cfg:H,noSupport:true}}var O=D.documentElement,i=u.HTMLPictureElement,P="addEventListener",$="getAttribute",q=u[P].bind(u),I=u.setTimeout,U=u.requestAnimationFrame||I,o=u.requestIdleCallback,j=/^picture$/i,r=["load","error","lazyincluded","_lazyloaded"],a={},G=Array.prototype.forEach,J=function(e,t){if(!a[t]){a[t]=new RegExp("(\\s|^)"+t+"(\\s|$)")}return a[t].test(e[$]("class")||"")&&a[t]},K=function(e,t){if(!J(e,t)){e.setAttribute("class",(e[$]("class")||"").trim()+" "+t)}},Q=function(e,t){var a;if(a=J(e,t)){e.setAttribute("class",(e[$]("class")||"").replace(a," "))}},V=function(t,a,e){var i=e?P:"removeEventListener";if(e){V(t,a)}r.forEach(function(e){t[i](e,a)})},X=function(e,t,a,i,r){var n=D.createEvent("Event");if(!a){a={}}a.instance=k;n.initEvent(t,!i,!r);n.detail=a;e.dispatchEvent(n);return n},Y=function(e,t){var a;if(!i&&(a=u.picturefill||H.pf)){if(t&&t.src&&!e[$]("srcset")){e.setAttribute("srcset",t.src)}a({reevaluate:true,elements:[e]})}else if(t&&t.src){e.src=t.src}},Z=function(e,t){return(getComputedStyle(e,null)||{})[t]},s=function(e,t,a){a=a||e.offsetWidth;while(a49?function(){o(t,{timeout:n});if(n!==H.ricTimeout){n=H.ricTimeout}}:te(function(){I(t)},true);return function(e){var t;if(e=e===true){n=33}if(a){return}a=true;t=r-(f.now()-i);if(t<0){t=0}if(e||t<9){s()}else{I(s,t)}}},ie=function(e){var t,a;var i=99;var r=function(){t=null;e()};var n=function(){var e=f.now()-a;if(e0;if(r&&Z(i,"overflow")!="visible"){a=i.getBoundingClientRect();r=C>a.left&&pa.top-1&&g500&&O.clientWidth>500?500:370:H.expand;k._defEx=u;f=u*H.expFactor;c=H.hFac;A=null;if(w2&&h>2&&!D.hidden){w=f;N=0}else if(h>1&&N>1&&M<6){w=u}else{w=_}}if(l!==n){y=innerWidth+n*c;z=innerHeight+n;s=n*-1;l=n}a=d[t].getBoundingClientRect();if((b=a.bottom)>=s&&(g=a.top)<=z&&(C=a.right)>=s*c&&(p=a.left)<=y&&(b||C||p||g)&&(H.loadHidden||x(d[t]))&&(m&&M<3&&!o&&(h<3||N<4)||W(d[t],n))){R(d[t]);r=true;if(M>9){break}}else if(!r&&m&&!i&&M<4&&N<4&&h>2&&(v[0]||H.preloadAfterLoad)&&(v[0]||!o&&(b||C||p||g||d[t][$](H.sizesAttr)!="auto"))){i=v[0]||d[t]}}if(i&&!r){R(i)}}};var a=ae(t);var S=function(e){var t=e.target;if(t._lazyCache){delete t._lazyCache;return}L(e);K(t,H.loadedClass);Q(t,H.loadingClass);V(t,B);X(t,"lazyloaded")};var i=te(S);var B=function(e){i({target:e.target})};var T=function(e,t){var a=e.getAttribute("data-load-mode")||H.iframeLoadMode;if(a==0){e.contentWindow.location.replace(t)}else if(a==1){e.src=t}};var F=function(e){var t;var a=e[$](H.srcsetAttr);if(t=H.customMedia[e[$]("data-media")||e[$]("media")]){e.setAttribute("media",t)}if(a){e.setAttribute("srcset",a)}};var s=te(function(t,e,a,i,r){var n,s,o,l,u,f;if(!(u=X(t,"lazybeforeunveil",e)).defaultPrevented){if(i){if(a){K(t,H.autosizesClass)}else{t.setAttribute("sizes",i)}}s=t[$](H.srcsetAttr);n=t[$](H.srcAttr);if(r){o=t.parentNode;l=o&&j.test(o.nodeName||"")}f=e.firesLoad||"src"in t&&(s||n||l);u={target:t};K(t,H.loadingClass);if(f){clearTimeout(c);c=I(L,2500);V(t,B,true)}if(l){G.call(o.getElementsByTagName("source"),F)}if(s){t.setAttribute("srcset",s)}else if(n&&!l){if(d.test(t.nodeName)){T(t,n)}else{t.src=n}}if(r&&(s||l)){Y(t,{src:n})}}if(t._lazyRace){delete t._lazyRace}Q(t,H.lazyClass);ee(function(){var e=t.complete&&t.naturalWidth>1;if(!f||e){if(e){K(t,H.fastLoadedClass)}S(u);t._lazyCache=true;I(function(){if("_lazyCache"in t){delete t._lazyCache}},9)}if(t.loading=="lazy"){M--}},true)});var R=function(e){if(e._lazyRace){return}var t;var a=n.test(e.nodeName);var i=a&&(e[$](H.sizesAttr)||e[$]("sizes"));var r=i=="auto";if((r||!m)&&a&&(e[$]("src")||e.srcset)&&!e.complete&&!J(e,H.errorClass)&&J(e,H.lazyClass)){return}t=X(e,"lazyunveilread").detail;if(r){re.updateElem(e,true,e.offsetWidth)}e._lazyRace=true;M++;s(e,t,r,i,a)};var r=ie(function(){H.loadMode=3;a()});var o=function(){if(H.loadMode==3){H.loadMode=2}r()};var l=function(){if(m){return}if(f.now()-e<999){I(l,999);return}m=true;H.loadMode=3;a();q("scroll",o,true)};return{_:function(){e=f.now();k.elements=D.getElementsByClassName(H.lazyClass);v=D.getElementsByClassName(H.lazyClass+" "+H.preloadClass);q("scroll",a,true);q("resize",a,true);q("pageshow",function(e){if(e.persisted){var t=D.querySelectorAll("."+H.loadingClass);if(t.length&&t.forEach){U(function(){t.forEach(function(e){if(e.complete){R(e)}})})}}});if(u.MutationObserver){new MutationObserver(a).observe(O,{childList:true,subtree:true,attributes:true})}else{O[P]("DOMNodeInserted",a,true);O[P]("DOMAttrModified",a,true);setInterval(a,999)}q("hashchange",a,true);["focus","mouseover","click","load","transitionend","animationend"].forEach(function(e){D[P](e,a,true)});if(/d$|^c/.test(D.readyState)){l()}else{q("load",l);D[P]("DOMContentLoaded",a);I(l,2e4)}if(k.elements.length){t();ee._lsFlush()}else{a()}},checkElems:a,unveil:R,_aLSL:o}}(),re=function(){var a;var n=te(function(e,t,a,i){var r,n,s;e._lazysizesWidth=i;i+="px";e.setAttribute("sizes",i);if(j.test(t.nodeName||"")){r=t.getElementsByTagName("source");for(n=0,s=r.length;n

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2. I would add a some js that would add lazyload class to all the tags once the DOM is loaded! Does this make sense?

Thanks