amp-img AMP HTML
For the image, not required special JavaScript, is enough with JS AMPHTML in General. There is a difference in the way of writing the image than usual. The code for the image:
  <amp-img src="url-image-here"
      width="1080"
      height="610"
      layout="responsive"
      alt="AMP HTML"></amp-img>
Layouts that support:
fill, fixed, fixed-height, flex-item, nodisplay, responsiveUse
srcset to determine the appropriate size of the screen image. Code like this  <amp-img src="https://ampbyexample.com/img/amp.jpg"
      srcset="https://ampbyexample.com/img/amp.jpg 1080w, https://ampbyexample.com/img/amp-900.jpg 900w, https://ampbyexample.com/img/amp-800.jpg 800w,
  https://ampbyexample.com/img/amp-700.jpg 700w, https://ampbyexample.com/img/amp-600.jpg 600w, https://ampbyexample.com/img/amp-500.jpg 500w, https://ampbyexample.com/img/amp-400.jpg 400w,
  https://ampbyexample.com/img/amp-300.jpg 300w, https://ampbyexample.com/img/amp-200.jpg 200w, https://ampbyexample.com/img/amp-100.jpg 100w"
      width="1080"
      height="610"
      layout="responsive"
      alt="AMP HTML"></amp-img>
To see the effect, please resize the browser.