Developing the Unsplash-Trello integration

This post details the technical implementation of the Unsplash integration into Trello. It describes the use of React for the background selector component, the unsplash-js library for API interactions, and the IntersectionObserver API to implement infinite scrolling for background options. It also discusses cross-browser compatibility challenges with flexbox and the solution of using `display: flex` throughout the DOM tree. The pre-launch strategy involved a soft launch to 5% of users and Trello Community members.