Can CSS Alone Achieve Firefox's Keyboard Zoom Functionality?

Enhancing Web Page Scalability with CSS

Enlarging an entire web page using keyboard shortcuts is a convenient feature provided by Firefox. Is it possible to achieve the same functionality through CSS alone?

Using the CSS Zoom Property

While there's no direct property to set the page size as a percentage, the CSS zoom property provides a viable solution. This property is supported by IE 5.5 , Opera, Safari 4, and Chrome. Its syntax is as follows:

zoom: value;

where value represents the scale factor. For example, zoom: 3 will enlarge the page by 300%.

Compatibility Considerations

Unfortunately, Firefox, the only major browser that does not support the zoom property, requires the use of the "proprietary" property -moz-transform. This property is only available in Firefox 3.5 and higher.

To ensure cross-browser compatibility, you can use the following code:

div.zoomed {
    zoom: 3;
    -moz-transform: scale(3);
    -moz-transform-origin: 0 0;
}

This code will apply a 300% zoom to elements with the class zoomed, accommodating both Firefox and other supported browsers.

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