Quick look at TypeScript Compiler API
by Chau Tran
What is TypeScript Compiler API?
import * as ts from "typescript";
const source = "let x: string = 'string'";
let result = ts.transpileModule(source, { compilerOptions: { module: ts.ModuleKind.CommonJS }});
console.log(JSON.stringify(result));Transformer
const transformer = someCode => someCodeCompilation Stages
-
Scan
-
Parse
-
Bind
-
Transform
-
Emit
Transform Stages
- before
- after
- afterDeclarations
So far...
We know that a Transformer is a function that takes in the AST (representation of our Source Code) and returns the altered (or not) AST.
We know that Transform stage happens AFTER the Parse stage. Which means our Transformer will be able to receive the AST from the Parser
What is the AST?
Ultimately, our goal is to modify this AST in our favor.
DEMO
Q&A
TS Compiler API
By Chau Tran
