Each line goes from 2016 to 2020. A higher point means a technology has been used by more people, and a point further to the right means more users want to learn it; or have used it and would use it again. Negative opinionsPositive opinionsHave usedHave not usedTypeScriptTypeScript20162017201820192020ReasonReason2017201820192020ElmElm20162017201820192020ClojureScriptClojureScript201620172018201920