Building on your comment, frameworks have described themselves as “polyfills”. Polyfills used to be libraries that added modern browser features to old browser

Building on your comment, frameworks have described themselves as “polyfills”. Polyfills used to be libraries that added modern browser features to old browsers. Then, Angular and React began using polyfills to add future features to modern browsers. The intent was always communicated as “some day we won’t need this because it’s built in to HTML5 and when that happens your initial payload will be smaller”. Typescript has had similar effect on JavaScript language features and syntax. This rewrite of the Vanilla JS TodoMVC is a great illustration of how far things have come.