Typescript Deep Dive by Basarat Ali Syed
Typescript Deep Dive by Basarat Ali Syed
Typescript Deep Dive by Basarat Ali Syed
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TypeScript <strong>Deep</strong> <strong>Dive</strong><br />
Emitter<br />
There are two emitters provided with the TypeScript compiler:<br />
emitter.ts : this is the emitter you are most likely to be interested in. Its the TS -> JavaScript emitter.<br />
declarationEmitter.ts : this is the emitter used to create a declaration file (a .d.ts ) for a TypeScript source file (a .ts<br />
file).<br />
We will look at emitter.ts in this section.<br />
Usage <strong>by</strong> program<br />
Program provides an emit function. This function primarily delegates to emitFiles function in emitter.ts . Here is the call<br />
stack:<br />
Program.emit -><br />
`emitWorker` (local in program.ts createProgram) -><br />
`emitFiles` (function in emitter.ts)<br />
One thing that the emitWorker provides to the emitter (via an argument to emitFiles ) is an EmitResolver . EmitResolver is<br />
provided <strong>by</strong> the program's TypeChecker, basically it a subset of local functions from createChecker .<br />
Emitter<br />
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