__webpack_require__.h is not a function

Explanation:

The error message “__webpack_require__.h is not a function” typically occurs in JavaScript applications that use Webpack as a module bundler. This error is related to the internal implementation of Webpack and can have multiple causes.

Possible Causes:

• Typo or incorrect usage: Make sure you are using the correct syntax and calling the appropriate method in your code. Check for any typos or incorrect function names.
• Missing or conflicting dependencies: If you are using third-party libraries or dependencies, make sure they are properly installed and up to date. Conflicts or mismatches between versions of different modules can lead to unexpected behavior.
• Build configuration issues: Incorrect Webpack configurations can also cause this error. Check your Webpack configuration file (usually named webpack.config.js) for any misconfigurations, such as missing loaders or plugins.
• Transformation order: The order in which modules are transformed by Webpack can sometimes affect the presence of the “__webpack_require__.h” function. Ensure that the order of transformation is correct by configuring the loaders appropriately.

Example:

Consider the following example where we have a simple JavaScript file and a basic Webpack configuration:

    
      // index.js
      const sum = (a, b) => {
        return a + b;
      }
      
      console.log(sum(2, 3));

      // webpack.config.js
      const path = require('path');
      
      module.exports = {
        entry: './index.js',
        output: {
          path: path.resolve(__dirname, 'dist'),
          filename: 'bundle.js',
        },
      };
    
  

In this example, calling the sum function should print the sum of 2 and 3 to the console. However, if you encounter the “__webpack_require__.h is not a function” error, it suggests that something went wrong during the Webpack bundling process.

To resolve this issue, you can try the following steps:

1. Check for any typos or mistakes in your code, especially in the functions or methods you are using.
2. Ensure that your dependencies are correctly installed and up to date by running “npm install” or “yarn install” in your project directory.
3. Verify your Webpack configuration and make sure all the necessary loaders and plugins are properly configured.
4. If you are using any custom transformations or loaders, double-check their order in the Webpack configuration to ensure they are applied correctly.

By investigating and addressing these potential causes, you should be able to resolve the “__webpack_require__.h is not a function” error in your JavaScript application.