Webpack – Critical dependency: the request of a dependency is an expression

Error Overview

The error message “Webpack – Critical dependency: the request of a dependency is an expression” typically occurs when Webpack encounters a dynamic import statement that cannot be resolved during the build process. This happens when the requested module is not a static string but rather an expression, making it difficult for Webpack to determine at build time what dependency to load. This error can lead to issues such as broken functionality or unexpected behavior in applications that rely on Webpack for module bundling.

Common Causes

The following are some common causes of this error:

• Dynamic Imports: Using dynamic imports with non-static strings can create ambiguity for Webpack, which needs to know the exact module to load.
• Incorrect Webpack Configuration: Misconfigured Webpack settings, particularly regarding module resolution and external dependencies, can lead to this error.
• Circular Dependencies: Circular dependencies may confuse Webpack, leading to unexpected behavior and errors.
• Outdated Packages: Using older versions of Webpack or related plugins may cause compatibility issues that trigger this error.
• Improperly Structured Code: Code that does not follow best practices for module imports can lead to Webpack’s inability to resolve dependencies.

Solution Methods

To address the error “Webpack – Critical dependency: the request of a dependency is an expression,” consider implementing the following methods:

Method 1: Using Static Imports

One effective solution is to replace dynamic imports with static strings. This approach allows Webpack to know exactly which module to load at build time.

1. Identify the line of code causing the error.
2. Change the dynamic import to a static string. For example, replace:
   javascript
const asset = 'config.json';
lazy(async () => await import(asset));
   with:
   javascript
lazy(async () => await import('config.json'));

Method 2: Use Webpack’s Context Replacement Plugin

If you require dynamic imports based on a variable, consider using the ContextReplacementPlugin to help Webpack resolve these expressions.

1. In your Webpack configuration file, add the following:
   “`javascript
   const webpack = require(‘webpack’);

module.exports =