Object.defineProperty（exports，“__ myModule”，{value：true}）;

Question

Error when json import in typescript

error message : Uncaught ReferenceError: exports is not defined

books.ts

import data from './books.json';

class books{
    //...code
    constructor(){
        //...code
    }
}

books.js

"use strict";
**Object.defineProperty(exports, "__esModule", { value: true });**
class books {
    //...code
    constructor() {
        //...code
    }
}

Answer 1

your code

import data from './books.json';

implies you are running in a module. To run modules on browsers you need a module bundler. eg https://webpack.github.io/

More

Quickstart on webpack with TypeScript https://basarat.gitbooks.io/typescript/content/docs/quick/browser.html