CODEWITHSUNDEEP
javascriptmodulejestjs
bigeasy
bigeasy

Reputation: 1

I cannot fix this error: Uncaught ReferenceError: module is not defined

I am exporting my js file, so I can use import into my unit test file. Here is my js file:

function getComputerChoice() {
  //stuff here
}
        
function playRound(playerSelection, computerSelection) {
  //stuff here 
}
    
function game() {
  // stuff
} 
    
module.exports = {
  getComputerChoice,
  playRound,
  game,
};

And in my test file, I am importing it this way:

const rockPaperScissors = require('../rockPaperScissors');

test('Verify the case for tie', () => {
  expect(rockPaperScissors.playRound('rock', 'rock')).toBe('TIE');
});
test('Verify the case for win', () => {
  expect(rockPaperScissors.playRound('rock', 'scissors')).toBe('WIN');
});
test('Verify the case for lose', () => {
  expect(rockPaperScissors.playRound('rock', 'paper')).toBe('LOSE');
});

The only way I can get my test file to work, is by exporting in the above format, but when I run the index.html in for this page, I see Uncaught ReferenceError: module is not defined.

Upvotes: 0

Views: 12737

Answers (1)

Quentin
Quentin

Reputation: 944568

require and module.exports are part of the CommonJS module system which is Node.js' default module system.

Browsers have no support for CommonJS so if you want to use code written using it you will need to convert it to a format that browsers do support. Typically this is done using a bundler such as Webpack or Parcel.

Browsers do support standard JavaScript modules (so long as you load them with <script type="module">) which use import and export so you could also rewrite your modules to use that.

Upvotes: 3

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