title: Is it still relevant to specify width and heigth attribute on images in HTML?
body: <p>I found <a href="https://stackoverflow.com/questions/1247685/should-i-specify-height-and-width-attributes-for-my-imgs-in-html">a similar question here</a>, with the answer: "<em>you should always define the width and height in the image tag</em>." But it is from 2009.</p>
  
  <p>In the meantime, many things has changed on frontend. We are all doing responsive page design now, for many devices and sizes simultaneously (mobile, tablet, desktop...).</p>
  
  <p>So, I wonder is it still necessary to specify the width and height attributes, and for what reason (for responsive, page speed, SEO...)?</p>