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Annabel Jacobi
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Asked: 2022-06-30T13:27:50+00:00 In:

The way to fix uncaught referenceerror: require is not defined.

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While writing JavaScript code, I received the “ReferenceError: require is not defined”.

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What is the cause of the problem and how to solve it quickly? I need the help of computer experts to fix this error. Thank you very much.

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2 Answers

  1. Best Answer
    Expert

    The cause:

    There are likely one of two reasons for your “ReferenceError: require is not defined”:

    -You attempted to use require in a browser setting.
    -Despite being in a Node.js environment, your project’s package.json file specifies “type”: “module.”

    Solution:

    JavaScript in the browser does not allow the use of require, thus you will need to find a replacement or a technique to make that work, such as by utilizing Browserify.

    // math.js
function add(a, b) {
return a + b;
}

// named export
module.exports = {
add,
};

// subtract.js
function subtract(a, b) {
return a - b;
}

// default export
module.exports = subtract;

// main.js
const { add } = require("./math"); // named import
const subtract = require("./subtract"); // default import

console.log(add(1, 2));
console.log(subtract(1, 2));

    This example uses the syntax for the ES6 import and export module:

    // math.js
// named export
export function add(a, b) {
return a + b;
}

// subtract.js
function subtract(a, b) {
return a - b;
}

// default export
export default subtract;

// main.js
import { add } from "./math"; // named import
import subtract from "./subtract"; // default import

console.log(add(1, 2));
console.log(subtract(1, 2));

    You can also use export default on anonymous functions in the subtract.js module shown above:

    // subtract.js
export default function (a, b) {
return a - b;
}
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  2. Expert
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