Why Do Some Paragraphs Suddenly Grow in Size in Chrome on Android?

Understanding the Dynamic Font Scaling in Chrome on Android

In a curious twist of events, Chrome browsers on Android have exhibited peculiar behavior where certain paragraphs of text abruptly increase in size, leading to visual disruptions and inconsistent text display. This enigmatic behavior has left many developers scratching their heads.

The Root of the Matter

Upon investigation, it was discovered that Chrome on Android employs a feature known as "font boosting." When a paragraph of text surpasses a predefined length threshold, Chrome perceives the readability may be compromised and automatically increases the font size to enhance visual clarity.

The Challenge

The resulting issue is that certain paragraphs within a website adhere to the specified font size, while others succumb to Chrome's font boosting, creating a visually jarring experience. This inconsistency poses a challenge to web designers seeking a predictable and cohesive user interface.

Disabling the Dissonance

Fortunately, there exists a simple solution to tame the font boosting behavior. By adding the following CSS property to the target element or its parent, the font boosting can be effectively disabled:

max-height: 999999px;

By setting an excessively large maximum height, Chrome is effectively prevented from initiating font boosting, regardless of the paragraph length. This enables developers to maintain consistent font sizes across their website content, ensuring a visually harmonious experience for their users.

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