Why is there an error when checking for image loading?

Question

JavaScript

There is a code that checks if the images have loaded. But the error knocks out: Uncaught ReferenceError: image is not defined. Tell me what could be the reason?

Here is the code:

image.onload = function(){
    alert("привет")
}

Answer 1

image is not defined

Literally: " image is not defined ".

Answer 2

And what is image write? Or is it just a variable in a clean field? If it is a reference to an element in the DOM then show how it is initialized.