Deemphasize old JSX transform

[eps1lon]

The old JSX transform requires a React import so you get a "This JSX tag requires 'React' to be in scope, but it could not be found.ts(2874)" for files without a tsconfig in VSCode by default.

However, the default nowadays is the new, automatic JSX transform in React which doesn't need a React import so VSCode should default to that.

Related:

• Update compilerOptions.jsx to reflect latest preferences TypeScript-Website#2994
• Deemphasize old JSX transform TypeScript#61586

[RyanCavanaugh]

What do you think about preserve instead? It's the most agnostic/forgiving, right?

[eps1lon]

The problem with preserve is that it would not pick up any JSX types in that case even if you have @types/react installed. And I guess if you don't have any types installed, it would also not try to download @types/react with automatic type aquisition?

I can see why it makes more sense to be agnostic but I don't think preserve is the best practical choice as a default.