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module.exports in js

module.exports = {
    method: function() {},
    otherMethod: function() {},
};


const myModule = require('./myModule.js');
const method = myModule.method;
const otherMethod = myModule.otherMethod;
// OR:
const {method, otherMethod} = require('./myModule.js');
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modules.exports javascript

//2 ways of module.exports
// 1
function celsiusToFahrenheit(celsius) {
  return celsius * (9/5) + 32;
}
 
module.exports.celsiusToFahrenheit = celsiusToFahrenheit;
 
//2
module.exports.fahrenheitToCelsius = function(fahrenheit) {
  return (fahrenheit - 32) * (5/9);
};
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exports in node js

require function returns exports of the require module.
module.exports is the returned object.
1)use module.exports to export single varibale e.g one class or one function 
e.g module.exports= Calculator.
2)use exports to export multiple named variables 
export.add = (a,b)=> a+b;
export.multiple=(a,b)=> a*b;
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module.exports with JavaScript

mycoolmodule/index.js
module.exports = "123";


routes/index.js


var mymodule = require('mycoolmodule')

var router = express.Router();

/* GET home page. */
router.get('/', function(req, res, next) {
	console.log(mymodule);
});
 
/*will show 123 in the terminal*/
module.exports = router;

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js exports

// First Export from other file
export default exampleFunction;
// for multiple exports use:
module.exports =  { exampleFunction1, exampleFunction2 };

// Then we import in the file where we want to use our functions
import exampleFunction from "./otherFile.js";
// for multiple imports, we desctructure
import { exampleFunction1, exampleFunction2 } from "./otherFile.js"

// Check MDN for more info on JS exports.
// NOTE: if running on node, add "type": "module" to your package.json file
//
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