Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript Configuring Webpack

Juan Li
Juan Li
5,709 Points
Posted by Juan Li
Juan Li
5,709 Points

bundle.js not working

After run command $npm run build, I get bundle.js file: the content is like this: 

!function(e){var t={};function n(r){if(t[r])return t[r].exports;var o=t[r]={i:r,l:!1,exports:{}};return e[r].call(o.exports,o,o.exports,n),o.l=!0,o.exports}n.m=e,n.c=t,n.d=function(e,t,r){n.o(e,t)||Object.defineProperty(e,t,{configurable:!1,enumerable:!0,get:r})},n.r=function(e){Object.defineProperty(e,"__esModule",{value:!0})},n.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return n.d(t,"a",t),t},n.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},n.p="",n(n.s=13)}([function(e,t,n){"use strict";function r(e){return function(){return e}}var o=function(){};o.thatReturns=r,o.thatReturnsFalse=r(!1),o.thatReturnsTrue=r(!0),o.thatReturnsNull=r(null),o.thatReturnsThis=function(){return this},o.thatReturnsArgument=function(e){return e},e.exports=o},function(e,t,n){"use strict";e.exports={}},function(e,t,n){"use strict";

When run $npm start, the scoreboard doesn't show up. But if I use the bundle.js file from teacher's code:

******/ (function(modules) { // webpackBootstrap
/******/    // The module cache
/******/    var installedModules = {};

/******/    // The require function
/******/    function __webpack_require__(moduleId) {

/******/        // Check if module is in cache
/******/        if(installedModules[moduleId])
/******/            return installedModules[moduleId].exports;

/******/        // Create a new module (and put it into the cache)
/******/        var module = installedModules[moduleId] = {
/******/            exports: {},
/******/            id: moduleId,
/******/            loaded: false
/******/        };

/******/        // Execute the module function
/******/        modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);

/******/        // Flag the module as loaded
/******/        module.loaded = true;

/******/        // Return the exports of the module
/******/        return module.exports;
/******/    }


/******/    // expose the modules object (__webpack_modules__)
/******/    __webpack_require__.m = modules;

/******/    // expose the module c

It then works fine. I don't understand why the minified javascript in the bundle.js not working in my case?

P.S. My package.json file:

{
  "name": "video-1",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "build": "webpack --optimize-minimize",
    "start": "webpack-dev-server"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "react": "^16.3.1",
    "react-dom": "^16.3.1"
  },
  "devDependencies": {
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.4",
      "babel-preset-es2015": "^6.9.0",
    "babel-preset-react": "^6.24.1",
    "webpack": "^4.5.0",
    "webpack-cli": "^2.0.14"
  }
}

Mod Note: Add 3 backticks to format code in the forums. Check out the markdown cheatsheet for more information. :)

1 Answer

Amber Cyr
Amber Cyr
19,699 Points
Amber Cyr
Amber Cyr
19,699 Points

I am not sure about your file naming convention, but if you are using the scoreboard app from a previous lesson, the "main" value of your package.json file should be "app.js" not "index.js". Try that instead to see if that works for you.