How Can I Programmatically Control Browser Zoom Levels Using JavaScript?

Altering the Magnification of Your Browser: A Guide to Zooming In and Out

Enhancing web browsing experiences necessitates managing the zoom level, particularly when images and layouts demand precision. This article addresses the possibility of modifying browser zoom levels through buttons and provides a code snippet to implement this functionality.

The Feasibility of Browser Zoom Manipulation

Customizing the browser zoom level is indeed feasible in Internet Explorer and Google Chrome, but it's not currently supported in Mozilla Firefox.

Implementing Zoom Buttons

To create buttons that adjust the browser zoom level, follow these steps:

1. Create Buttons:

   Include two buttons in the HTML code: one for zooming in ( ) and another for zooming out (-).

2. Add Event Listeners:

   Set up event listeners for the buttons to trigger the zoom functionality.

3. Utilize the Zoom() Property:

   In JavaScript, the document.body.style.zoom property controls the browser zoom level.

4. Implement Zoom Functionality:

   Define a JavaScript function that adjusts the zoom level and assign it to the buttons' event listener.

function toggleZoomScreen() {
   document.body.style.zoom = "80%";
}

5. Link Button to Function:

   Assign the toggleZoomScreen() function to the buttons' onclick event handler.

<img src="example.jpg" alt="example" onclick="toggleZoomScreen()" />

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