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Calculate the distance to the bottom of a page

Written byPhuoc Nguyen

Created

23 Aug, 2023

Category

DOM

The following snippet calculates how far you are from the bottom of the page.

Here's how it works: it takes the total height of the page (`document.body.scrollHeight`), subtracts the height of your screen (`window.innerHeight`), and then subtracts how far down you've already scrolled (`window.scrollY`).

The result is the distance from your current position to the bottom of the page.

JavaScript version

distanceToBottom.js

const distanceToBottom = document.body.scrollHeight - window.innerHeight - window.scrollY;

TypeScript version

distanceToBottom.ts

const distanceToBottom: number = document.body.scrollHeight - window.innerHeight - window.scrollY;

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Phước Nguyễn

Calculate the distance to the bottom of a page

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