What TypeScript does for me is Type Hinting. Using JavaScript, in many cases, is like walking in the dark, unless the author is kind enough to write a JSDoc for me.
When I use JavaScript, I write a lot of JSDoc as well. Even though it is not as strong and easy as TypeScript.
Also, it seems to me that TypeScript tries to break compatibility with JSDoc, at least in VSCode. Must be a hidden plot of Microsoft.
What TypeScript does for me is Type Hinting. Using JavaScript, in many cases, is like walking in the dark, unless the author is kind enough to write a JSDoc for me.
When I use JavaScript, I write a lot of JSDoc as well. Even though it is not as strong and easy as TypeScript.
Also, it seems to me that TypeScript tries to break compatibility with JSDoc, at least in VSCode. Must be a hidden plot of Microsoft.
VSCode has surprisingly good type hinting for Vanilla JavaScript as well, and I'm optimistic that it is going to improve!
The type hinting in vscode for vanilla js uses the ts language server under the hood