Membuat Program TypeScript dengan API

Apa Itu API Kompilator?

import ts from "typescript";
// Use ts.createProgram to start

Memasang Paket typescript

npm install typescript
# Also install types if needed
npm install --save-dev @types/node

Membuat Program

import ts from "typescript";
const program = ts.createProgram(["src/index.ts"], {
  target: ts.ScriptTarget.ES2020,
  module: ts.ModuleKind.CommonJS,
  strict: true,
});

Mengakses Berkas Sumber

const sourceFiles = program.getSourceFiles();
sourceFiles.forEach(sf => {
  if (!sf.isDeclarationFile) {
    console.log(sf.fileName);
  }
});

Mendapatkan Pemeriksa Tipe

const checker = program.getTypeChecker();
// Now use checker to resolve types, symbols, etc.

Membaca Diagnostik

const diagnostics = ts.getPreEmitDiagnostics(program);
diagnostics.forEach(d => {
  const msg = ts.flattenDiagnosticMessageText(d.messageText, "
");
  console.log(msg);
});

Membaca tsconfig.json

const cfgFile = ts.readConfigFile("tsconfig.json", ts.sys.readFile);
const parsed = ts.parseJsonConfigFileContent(
  cfgFile.config,
  ts.sys,
  process.cwd()
);
const program2 = ts.createProgram(parsed.fileNames, parsed.options);

Resolusi Simbol

const sf = program.getSourceFile("src/index.ts")!;
ts.forEachChild(sf, node => {
  if (ts.isVariableStatement(node)) {
    const symbol = checker.getSymbolAtLocation(
      node.declarationList.declarations[0].name
    );
    console.log(symbol?.getName());
  }
});

Menghasilkan Keluaran

const emitResult = program.emit();
const exitCode = emitResult.emitSkipped ? 1 : 0;
process.exit(exitCode);

Program Inkremental

// Incremental compilation tracks which files changed
// to avoid reprocessing unchanged files

Rangkuman: Dasar-Dasar API Kompilator

Pemeriksaan Cepat

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