.tsx have included JSX also. On another point of view, you can copy everything from a .ts file and paste on .tsx file, and you don't need to modify anything. But if you're copying from a .tsx file you need to refactor it by removing the JSX elements. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.