Can we combine multiple .ts files into a single .js file?

Yes, we can combine multiple files. While compiling, we need to add –outFILE [OutputJSFileName] option.

tsc -- outFile comman.js file1.ts file2.ts file3.ts

This will compile all 3 “.ts” file and output into a single “comman.js” file.

tsc --outFile file1.ts file2.ts file3.ts

If you don’t provide an output file name, file2.ts and file3.ts will be compiled and the output will be placed in file1.ts. So now your file1.ts contains JavaScript code.