javascript valid picture url code example

Example 1: javascript check image src

if (img.getAttribute('src') === 'on.png')

Example 2: js get image src

var youtubeimgsrc = document.getElementById("youtubeimg").src;

Example 3: js detect all images errors

window.addEventListener("error", e => {
  /* query selector images */
  // image element on error => replace source 
})