document.getElementByTagName() enables you to find objects based in tag name like img, a, ...

Below example shows how to find image objects in the HTML page:

const images = document.getElementsByTagName('img');

for (let i = 0; i < images.length; i++) {
    console.log(images[i].src);
}


If you want to filter by some criteria, you can use the querySelectorAll() method instead:

const images = document.querySelectorAll('img.my-class');

for (let i = 0; i < images.length; i++) {
    console.log(images[i].src);
}