Alias in webpack for Typescript modules

I'm facing an issue where I need to assign an alias for 'Hammer' in my code. I've already included the necessary paths in my tsconfig file as shown below:

{
  "compilerOptions": {
    "declaration": true,
    "noImplicitAny": false  ,
    "noEmitOnError": true,
    "noUnusedLocals": false ,
    "noUnusedParameters": false ,
    "module": "commonjs",
    "moduleResolution": "node",
    "target": "ES5",
    "outDir": "./lib",
    "lib": ["ES5", "ES2015.Promise", "DOM", "ES2015.Collection", "es2016"],
    "jsx": "react",
    "types": [],
    "baseUrl": ".",
    "paths": {
      "Hammer": ["hammerjs/hammer.js"]
    }
  },
  "include": ["typings/index.d.ts","src/*"]
}

Despite having set up the alias, I'm still encountering an error when trying to use 'Hammer' in geo.js with 'require(Hammer)'. Can someone point out what I might be missing?

ERROR in ./~/geojs/geo.js
Module not found: Error: Can't resolve 'Hammer' in '/home/chaudhary/tools/jupyterlab/mydev/share/jupyter/lab/staging/node_modules/geojs'
 @ ./~/geojs/geo.js 3:27-44
 @ ./~/@jupyterlab/geojson-extension/lib/index.js
 @ ./build/index.out.js
typescriptwebpackjupyter-lab

Answer №1

After some investigation, I discovered that the issue in my situation was being caused by the calling program (JupyterLab) generating a new webpack configuration every time the Jupyter lab build was triggered. To resolve this temporarily, I integrated Hammer into GeoJS (by removing Hammer as an external in the webpack configuration).

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