It’s practically a development trope: Don’t like the front-end framework your developers use? Wait six months, and it will change. But developer adoption data over the past three years shows that Angular and React/React.js are developer favorites with staying power. While Angular is more broadly adopted, React and Vue/Vue.js are growing quickly. This report breaks down for application development and delivery (AD&D) pros what front-end frameworks developers adopt and why, and where we see the landscape heading in 2020.