Generate javascript from typescript AST?

Question

I'm using the built-in parser to generate the AST from source code:

const ts = require('typescript')
//...
const ast = ts.createSourceFile(filename, fs.readFileSync(filename).toString(), ts.ScriptTarget.ES6, true)

Given an arbitrary node in the tree, how do I generate the typescript from the node?

basarat · Accepted Answer · 2016-01-12 02:41:14Z

1

an arbitrary node in the tree, how do I generate the typescript from the node

You cannot in the current version of the compiler. The only node that supports generation is SourceFile.

There is talk to make the emitter more split (transformer based like the Babel emitter).

answered Jan 12, 2016 at 2:41

basarat

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3 Comments

So given a node, is there any way to get back the corresponding source code? I notice that there are pos and end properties.

There is a getTextOfNode function in the ts namespace

ts.getTextOfNode is exactly what i was looking for. Thanks