如何通过查看源代码来区分 typescript 和 javascript？

Question

I am inspecting some code on Github and I need to quickly understand if the script is javascript or typescript.

Are there any easy shortcuts or clues to this?

As an example, in this image from https://www.typescriptlang.org/ gives me a clue that if an array is declared with a bracket [] after the variable name, then it is typescript.

Answer 1

You can distinguish between the two formats by looking simply at the functions.

Are any of the functions specifying types such as 'string,integer,object,array,function?...' etc?

In traditionally javascript this is not allowed.

Best, AT

Also as others may have pointed out, you can also check the file extension