Building a React component that automatically updates its font size to fill its parent element as fully as possible.

Sentry is a platform for monitoring, troubleshooting, and error tracking in software applications. Readers can learn about logging, error handling, and performance monitoring techniques. With documentation, tutorials, and best practices, Sentry helps developers identify and fix issues in their applications, ensuring a seamless user experience.

Sentry Engineering

This post discusses the challenge of dynamically scaling text to fit within a container in React, specifically within the context of a Sentry dashboard. It reviews several approaches, including SVGs, CSS transforms, container queries, and JavaScript, before settling on a JavaScript-based solution. The final solution leverages React hooks, ResizeObserver, and a resizing algorithm to dynamically adjust text size efficiently, ensuring excellent performance and user experience. The post also includes code examples and performance insights derived from real-user telemetry.

Perfectly Fitting Text to Container in React

Attempt 1: Driving UI Through React State

Attempt 2: Driving UI Through ResizeObserver