Adjusting package.json settings for an npm module

An npm package that I am using has an incorrect file path specified in its package.json. The current configuration is:

  "main": "./htmldiff.js",

However, for it to function correctly, it should be:

  "main": "./src/htmldiff.js",

I can try committing and downloading the un-merged version, but I wonder if there is a simpler solution that only involves updating local files?

Answer ā„–1

One option is to bypass the main target and directly import from the node_modules folder in this manner

import xx from './node_modules/htmldiff/src/htmldiff'

If you want to avoid using a relative path such as ../../../, consider utilizing a resolve alias with webpack or babel.

  const path = require('path');
  resolve: {
    alias: {
      '@': path.resolve('node_modules'),
    }
  }

This way, you can import it like so

import xx from '@/htmldiff/src/htmldiff'

Answer ā„–2

If you need to update the content of a file, one way is to access and modify the package.json file. First, read the file content using fs.readFileSync() method and parse it as an object with JSON.parse(). Make the necessary changes to the object, stringify the updated data, and then write it back to the file using fs.writeFileSync(). This example shows a synchronous approach for simplicity, but consider using the asynchronous version for better performance. Keep in mind that writeFile() will override the existing content by default.

   'use strict';

   const 
          fs      = require('fs'),
          content = fs.readFileSync('package.json', 'utf8'),
          parsed  = JSON.parse(content);
    
    parsed.main = "./src/htmldiff.js";
    
    fs.writeFileSync('package.json', JSON.stringify(parsed));

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