I have been trying to write a simple typescript async program. I got it running in standard JS but the compiler turns it into un-executable code when I write it in typescript. How do I run the following code,
import fetch from "node-fetch"
const git_zen = async () => {
const response:any = await fetch('https://api.github.com/zen');
const zen:string = await response.text();
return zen;
};
const myZen:any = git_zen();
myZen.then((zen:any) => {console.log(zen)});
First I install fetch with npm i node-fetch
Then even though the documentation states that the types are included the compiler tells me to run npm i --save-dev @types/node , after this I get an error that the in the packages module "type:modules" is not set and finally when it does sometimes compile with tsc zen.ts, I get the following output
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
exports.__esModule = true;
var node_fetch_1 = require("node-fetch");
var git_zen = function () { return __awaiter(void 0, void 0, void 0, function () {
var response, zen;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, (0, node_fetch_1.fetch)('https://api.github.com/zen')];
case 1:
response = _a.sent();
return [4 /*yield*/, response.text()];
case 2:
zen = _a.sent();
return [2 /*return*/, zen];
}
});
}); };
var myZen = git_zen();
myZen.then(function (zen) { console.log(zen); });
When I try running this code with node using node zen.js, I get errors like Must use import to load ES Module: /Users/hassankamran/code/proj/node_modules/node-fetch/src/index.js require() of ES modules is not supported etc.
tsconfig.json.