Adjusting Font Size in CSS with text-size-adjust

css text size adjust
10 November 2024

Using the text-size-adjust feature in CSS allows us to adjust the font size in browsers. This feature is particularly useful in mobile browsers where text may automatically scale larger, which can often be problematic.

By default, mobile browsers may enlarge text when zooming in for better reading. However, in some cases, this enlargement might create visual design issues on the page. By utilizing text-size-adjust, you can achieve greater control over this behavior.

One of the main use cases for text-size-adjust is in responsive designs when you try to maintain visual stability. By properly adjusting this feature, you ensure that text displays correctly across different devices.

The text-size-adjust property can take values like auto, none, and percentage values. Using auto allows the browser to execute its default behavior. none prevents the browser from making any adjustments to the font size, while percentage values allow you to set a specific size.

Below are several code examples for using the text-size-adjust feature:

body {\r\n  -webkit-text-size-adjust: 100%;\r\n  -moz-text-size-adjust: 100%;\r\n  -ms-text-size-adjust: 100%;\r\n  text-size-adjust: 100%;\r\n}\n\nheader {\r\n  -webkit-text-size-adjust: none;\r\n  -moz-text-size-adjust: none;\r\n  -ms-text-size-adjust: none;\r\n  text-size-adjust: none;\r\n}\n\narticle {\r\n  text-size-adjust: auto;\r\n}

In the above example, in the body style, the font size is set to 100% across all browsers, meaning it maintains the default size without any changes. For the header element, text-size-adjust is set to none, which means the text size will remain static without changes. In the article element, text-size-adjust is set to auto, allowing the browser to make adjustments for optimal reading.

FAQ

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Why is text-size-adjust important on mobile?

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How do I use text-size-adjust in my project?

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What different values can text-size-adjust take?