Dashboards & Visualizations

Splunk JS importing external modules (React components)

derekf
Explorer

I have a very basic external project written in TypeScript. It simply exports a jsx.element. I use webpack and babel to create a bundle, but whenever I try to require it in Splunk web, the object is undefined.

What am I doing wrong?

HelloReact.tsx

import React from 'react';
export let z = <div>Hello world!</div>;

.babelrc

{
    "presets": [
        "@babel/env",
        "@babel/typescript",
        "@babel/react"
    ],
    "plugins": [
        "@babel/proposal-class-properties",
        "@babel/proposal-object-rest-spread"
    ]
}

package.json

{
  "name": "babeltest",
  "version": "1.0.0",
  "description": "",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "bundle": "webpack"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@babel/cli": "^7.1.2",
    "@babel/core": "^7.1.2",
    "@babel/plugin-proposal-class-properties": "^7.1.0",
    "@babel/plugin-proposal-object-rest-spread": "^7.0.0",
    "@babel/preset-env": "^7.1.0",
    "@babel/preset-react": "^7.0.0",
    "@babel/preset-typescript": "^7.1.0",
    "babel-loader": "^8.0.4",
    "typescript": "^3.1.3",
    "webpack": "^4.21.0",
    "webpack-cli": "^3.1.2"
  },
  "dependencies": {
    "@types/react": "^16.4.18",
    "@types/react-dom": "^16.0.9",
    "react": "^16.5.2",
    "react-dom": "^16.5.2"
  }
}

tsconfig.json

{
  "compilerOptions": {
    "target": "esnext",
    "module": "commonjs",
    "jsx": "react",
    "declaration": true,
    "outDir": "lib",
    "strict": true,
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true
  }
}

webpack.config.js

var path = require('path');

module.exports = {
    mode: 'development',
    entry: './src/HelloReact',
    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: 'bundle.js'
    },
    resolve: {
        extensions: ['.ts', '.tsx', '.js', '.json']
    },
    module: {
        rules: [{
            test: /\.(tsx?)|(js)$/,
            exclude: /node_modules/,
            loader: 'babel-loader',
        }],
    } };

Splunk file that is using the above

require([
    "/static/app/<appname>/bundle.js",
], function(thing) {
    console.log(thing) // this always prints 'undefined'
});
0 Karma
1 Solution

derekf
Explorer

For anyone else running into something similar. The following should be added to the output of the webpack config

library: 'HelloReact',
libraryTarget: 'umd'

https://webpack.js.org/configuration/output/#output-librarytarget

View solution in original post

0 Karma

derekf
Explorer

For anyone else running into something similar. The following should be added to the output of the webpack config

library: 'HelloReact',
libraryTarget: 'umd'

https://webpack.js.org/configuration/output/#output-librarytarget

0 Karma
Get Updates on the Splunk Community!

Index This | I am a number, but when you add ‘G’ to me, I go away. What number am I?

March 2024 Edition Hayyy Splunk Education Enthusiasts and the Eternally Curious!  We’re back with another ...

What’s New in Splunk App for PCI Compliance 5.3.1?

The Splunk App for PCI Compliance allows customers to extend the power of their existing Splunk solution with ...

Extending Observability Content to Splunk Cloud

Register to join us !   In this Extending Observability Content to Splunk Cloud Tech Talk, you'll see how to ...