评估打字稿语句时出现“ ReferenceError：模块未定义”

Question

Here is my code

// properties.ts
export const properties = {
    title: "Google"
};

// example.ts
import { properties } from './properties.ts';

console.log(properties.title); // Prints Google
console.log(eval("properties.title")); // Expected to print Google but throws ReferenceError: properties is not defined

However, console.log(eval('properties_1.properties.title')) // Prints Google

But how to derive "properties_1" is my concern.

Answer 1

The import statement in TS transpiles to a new variable. This is by default in typescript and eval cannot compute that.

I tried like this and it worked,

import { properties } from './properties';
let p = properties;
console.log(p.title); // Prints Google
console.log(eval('p.title'));

Another way you can do this by importing properties into variable,

import * as properties  from './properties';
console.log(properties.properties.title); // Prints Google
console.log(eval('properties.properties.title')); // Prints Google

Make sure you compile this way,

>tsc dynamic.ts -t ES6 -m commonjs