1const myFunc=function(src){return new Promise(function(resolve,reject){const image=new Image();image.src=src;image.onload=function(){resolve(image)};image.onerror=function(error){reject(error)}})};const imgs=document.getElementsByTagName('img');for(const img of imgs){const src=img.getAttribute('data-src')||img.getAttribute('src');myFunc(src).then(function(res){if(!img.hasAttribute('width')){img.setAttribute('width',res.width)} 2if(!img.hasAttribute('height')){img.setAttribute('height',res.height)} 3if(!img.hasAttribute('alt')){img.setAttribute('alt','')}}).catch(function(error){console.log(error)})}
Line numbers count LF bytes from the start of the resource, as the search results do. Vendor segments are library code the classifier recognised; they are stored but not indexed. Bytes are shown as Latin1 characters, one per byte.