What metric would you use to define the leading frontend framework, and what is it?

I'm familiar enough with Angular, React, Flutter, Vue, and Svelte as big names in the ecosystem, but have really only done scrappy development with React and not much with the others.

Google trends seems to show React is still a leader [1], and React has more than double the amount of Github stars than any of the others I've mentioned except Flutter, by which it still leads a healthy margin.

- [1] https://trends.google.com/trends/explore?cat=32&date=today%2...