如何通过nodejs使用TypeScript编译器？

Question

I have a sample code and saved it to a file such as hello.ts

After installing nodejs on windows use below command for installing typescript

npm install -g typescript

How can I compile hello.ts with node.js directly?

When I install "TypeScript 1.6 in VS2015" and use tsc.exe don't have any problem but I want to use node.js instead of VS 2015 extension

Please guide me generate.js and.ds through Node.js

Answer 1

Please guide me generate .js and .ds through Node.js

You have two options:

• Run tsc.js as a node script
• Use typescript as an npm module

Run node tsc.js

This is the approach taken by some tools eg grunt-ts . You basically just call spawn on the current process process.execPath passing in the other commands as args ( -d ).

One sample

Run TypeScript as a node module

If you are playing with the typescript compiler API highly recommend NTypeScript See the Readme for reasons .

The TypeScript compiler provides a simple function called transpile that you can use to get the expected output and then write it out to disk yourself.

PS: I have some docs on the TypeScript compiler internals here : https://basarat.gitbooks.io/typescript/content/docs/compiler/overview.html

Answer 2

Run tsc in the command line, you'll have the help page. Compiling a script is easy, just tsc hello.ts in the folder containing your script, you'll get a hello.js file.

Answer 3

My preferred way to get going is to use typescript-require . this library basically adds nodejs support for typescript.

your index file should be a javascript file and it will look like this

require('typescript-require');
require('./src/main.ts');

and main.ts is a typescript file.

Answer 4

Here's a programatically way from TS/Node to run the equivalent of tsc from within a code itself (Note: this uses the TypeScript Compiler API ):

https://gist.github.com/rnag/0d8fe2e72dc7b48743c13f9ca8837a4c