1.0web design & Host domain providerhttps://8899.ir/webrich600338<blockquote class="wp-embedded-content" data-secret="oqNI12aZYp"><a href="https://8899.ir/web/stp-web-20261008-srcset-en/">Responsive images with srcset: serve the right file</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://8899.ir/web/stp-web-20261008-srcset-en/embed/#?secret=oqNI12aZYp" width="600" height="338" title="“Responsive images with srcset: serve the right file” — web design & Host domain provider" data-secret="oqNI12aZYp" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://8899.ir/web/wp-includes/js/wp-embed.min.js </script> https://8899.ir/web/wp-content/uploads/2026/10/stpweb_20261008-srcset-en.jpg800600Responsive images with srcset: serve the right file Goal: avoid forcing a 1200-pixel image onto every phone; let srcset and sizes guide the browser to an appropriate file. Prepare three test versions of one image at 480, 800, and 1200 pixels wide, all with the same aspect ratio. Name the files as shown in the […]