Issue Alert: Typescript Compilation Warning - A crucial dependency has been identified where the request of a dependency is in the form

Question

Issue Alert: Typescript Compilation Warning - A crucial dependency has been identified where the request of a dependency is in the form

Specifications:

Angular CLI: 11.0.4
Node: 15.12.0
OS: win32 x64
Angular: 11.2.3
Typescript: 4.0.7

Currently, I have the following imports:

import * as ts from "typescript";

and the following method is in place:

 testingTranspile(){
    const sanitized: string= leadLocation.replace(/[^a-zA-Z0-9.\[\]]/g, ""); 

    let code: string=`try{ console.log('works') } catch(e){ console.log(e.toString()) }  `; 
    let result = ts.transpile(code); 
    eval(result); 
 }

This method is functional and displays 'works' on the console when ng serve is executed.

However, upon attempting to build the application (using

ng build --prod --output-hashing none --extract-css

), a warning is generated:

 Warning: ./node_modules/typescript/lib/typescript.js 6116:41-60
Critical dependency: the request of a dependency is an expression
    at CommonJsRequireContextDependency.getWarnings (...\node_modules\webpack\lib\dependencies\ContextDependency.js:40:18)    at Compilation.reportDependencyErrorsAndWarnings (...\node_modules\webpack\lib\Compilation.js:1454:24)
    ...

The app still builds successfully, but eliminating warnings is preferred. Upon investigation, it was found that the mentioned method contributes to the warning. When the content within testingTranspile() is cleared, no warnings appear during build.

What steps can be taken to address this warning? A search for transpile/eval related warnings did not yield any relevant solutions.

angular typescript

Answer 1

Answer №1

Upon stumbling upon this thread, I found myself facing a similar dilemma:

"./node_modules/typescript/lib/typescript.js 3742:20-42
Critical dependency: the request of a dependency is an expression"

After some investigation, it became clear that my mistake was importing typescript at the beginning of my code without actually using it anywhere else. Perhaps you are encountering a comparable issue, so why not consider running a lint test to troubleshoot?

Answer 2

Upon stumbling upon this thread, I found myself facing a similar dilemma:

"./node_modules/typescript/lib/typescript.js 3742:20-42
Critical dependency: the request of a dependency is an expression"

After some investigation, it became clear that my mistake was importing typescript at the beginning of my code without actually using it anywhere else. Perhaps you are encountering a comparable issue, so why not consider running a lint test to troubleshoot?

Answer 3

Answer №2

If your project involves webpack, it is possible that the typescript.js file is being parsed causing lint errors. To resolve this issue, include the path to the typescript.js file in the noParse array within your webpack.config.js file.

To do this in webpack.config.js:

const config = {
  entry: "./src/index.ts",

  ...

  module: {
    rules: [...],
    noParse: [require.resolve("typescript/lib/typescript.js")],
  },

  ...

};

For NextJs, add this code snippet into next.config.js:

module.exports = {
  webpack: (
    config, options
  ) => {
    config.module.noParse = [require.resolve("typescript/lib/typescript.js")]
    return config
  },
};

By implementing this solution, you can eliminate the lint warning in Vanilla js and Nextjs. Please note that this has not been tested for Angular projects.

Refer to the noParse documentation for more information.

Answer 4

If your project involves webpack, it is possible that the typescript.js file is being parsed causing lint errors. To resolve this issue, include the path to the typescript.js file in the noParse array within your webpack.config.js file.

To do this in webpack.config.js:

const config = {
  entry: "./src/index.ts",

  ...

  module: {
    rules: [...],
    noParse: [require.resolve("typescript/lib/typescript.js")],
  },

  ...

};

For NextJs, add this code snippet into next.config.js:

module.exports = {
  webpack: (
    config, options
  ) => {
    config.module.noParse = [require.resolve("typescript/lib/typescript.js")]
    return config
  },
};

By implementing this solution, you can eliminate the lint warning in Vanilla js and Nextjs. Please note that this has not been tested for Angular projects.

Refer to the noParse documentation for more information.

Issue Alert: Typescript Compilation Warning - A crucial dependency has been identified where the request of a dependency is in the form

Answer №1

Answer №2

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