postinstall.js

var hook = require("nativescript-hook")(__dirname);
hook.postinstall();

var fs = require("fs");
var path = require("path");
var upgrader = require("./tsconfig-upgrader");

var projectDir = hook.findProjectDir();
if (projectDir) {
 const tsconfigPath = path.join(projectDir, "tsconfig.json");
 if (fs.existsSync(tsconfigPath)) {
 upgrader.migrateTsConfig(tsconfigPath, projectDir);
 } else {
 createTsconfig(tsconfigPath);
 }
}

function createTsconfig(tsconfigPath) {
 var tsconfig = {};

 tsconfig.compilerOptions = {
 module: "commonjs",
 target: "es5",
 experimentalDecorators: true,
 emitDecoratorMetadata: true,
 noEmitHelpers: true,
 noEmitOnError: true,
 };
 upgrader.migrateProject(tsconfig, tsconfigPath, projectDir);

 tsconfig.exclude = ["node_modules", "platforms"];

 fs.writeFileSync(tsconfigPath, JSON.stringify(tsconfig, null, 4));
}