How do I Get the Scrollbar Position in JavaScript?

Obtaining Scrollbar Position using JavaScript

Detecting the scrollbar's position in the browser is crucial for determining the current view's location in the page. Instead of relying on complex methods that track the thumb and track height, JavaScript offers a simpler solution.

To access the scrollbar position, you can utilize the properties element.scrollTop and element.scrollLeft. These properties provide the vertical and horizontal offsets, respectively, that have been scrolled. element can refer to document.body if you wish to capture the entire page's scrolling.

To calculate percentages, you can compare these values to element.offsetHeight and element.offsetWidth. Here's a code snippet that demonstrates how to use these properties:

// Get the scrollbar positions
const scrollTop = document.body.scrollTop;
const scrollLeft = document.body.scrollLeft;

// Calculate the scroll percentages
const scrollTopPercentage = scrollTop / document.body.offsetHeight;
const scrollLeftPercentage = scrollLeft / document.body.offsetWidth;

// Log the scrollbar positions and percentages for debugging
console.log('Scrollbar Positions: Y: ', scrollTop, ' X: ', scrollLeft);
console.log('Scrollbar Percentages: Y: ', scrollTopPercentage, ' X: ', scrollLeftPercentage);

By using these properties and calculations, you can effectively determine the position of the scrollbar in the browser window and pinpoint where in the page the current view is located.

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