I'm looking to bring in a module that requires an argument in Typescript. This is how it looks in javascript:
const cors = require('cors')({origin: true}); // JS
What would be the equivalent syntax in Typescript?
I'm looking to bring in a module that requires an argument in Typescript. This is how it looks in javascript:
const cors = require('cors')({origin: true}); // JS
What would be the equivalent syntax in Typescript?
It is not possible to achieve this with just one import statement.
require statement?The functionality of the require statement becomes clearer once you break it down.
When you use
const cors = require('cors')({origin: true});const corsPackage = require('cors');
const cors = corsPackage({origin: true});
You can see that you're essentially importing the package and then initializing it.
The correct way to rewrite this using ES6 / TypeScript is as follows:
Initially, import the desired package:
import cors from 'cors';
Subsequently, you have the option to either initialize cors inline or assign it to a variable:
// Storing the initialized `cors` package in a variable
const allowCors = cors({origin: true});
// OR, initialize it at its usage point. For example, with express:
router.use(cors(options));
The reason why you may not find the method of importing the cors package with the ES6 import statement in its documentation is because the package is intended for backend use with Node, rather than in the browser.
Until the release of Node v10.0 LTS, you will need to utilize the --experimental-modules flag to employ this feature.
Your inquiry pertains to utilizing the ES6
importstatement, which is not specific to TypeScript but instead a capability inherited due to TypeScript's transpilation into browser-ready code.
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