Превъртете долния javascript

window.scrollTo(0,document.body.scrollHeight);

js превъртете надолу

window.scrollTo(0,document.body.scrollHeight);

// To scroll to the bottom of a div
const theElement = document.getElementById('elementID');

const scrollToBottom = (node) => {
	node.scrollTop = node.scrollHeight;
}

scrollToBottom(theElement); // The specified node scrolls to the bottom.

javascript превъртете надолу

// To scroll to the bottom of a div
const theElement = document.getElementById('elementID');

const scrollToBottom = (node) => {
	node.scrollTop = node.scrollHeight;
}

scrollToBottom(theElement); // The specified node scrolls to the bottom.

window.onscroll = function() {
    let d = document.documentElement;
    let offset = d.scrollTop + window.innerHeight;
    let height = d.offsetHeight;

    console.log('offset = ' + offset);
    console.log('height = ' + height);

    if (offset >= height) {
        console.log('At the bottom');
    }
};