Troubleshooting the 'Buffer' name not found error occurring in an Angular application

While working on my application, I started encountering this error message out of nowhere. Everything was functioning correctly before, and I'm clueless as to what could have caused these errors to pop up. I attempted to address the issue by installing @types/node and adding

"angularCompilerOptions": {
    "types" : ["node"]
 }

to my tsconfig.json, but unfortunately, that didn't resolve the problem.

ERROR in node_modules/@angular/compiler-cli/src/ngtsc/file_system/src/types.d.ts:37:43 - error 
TS2591: Cannot find name 'Buffer'. Do you need to install type definitions for node? Try `npm i 
@types/node` and then add `node` to the types field in your tsconfig.

37     readFileBuffer(path: AbsoluteFsPath): Buffer;
node_modules/@angular/compiler-cli/src/ngtsc/file_system/src/types.d.ts:38:52 - error TS2591: Cannot 
find name 'Buffer'. Do you need to install type definitions for node? Try `npm i @types/node` and 
then add `node` to the types field in your tsconfig.

38     writeFile(path: AbsoluteFsPath, data: string | Buffer, exclusive?: boolean): void;                                                      
node_modules/@angular/compiler-cli/src/ngtsc/file_system/src/node_js_file_system.d.ts:10:43 - error 
TS2591: Cannot find name 'Buffer'. Do you need to install type definitions for node? Try `npm i 
@types/node` and then add `node` to the types field in your tsconfig.

10     readFileBuffer(path: AbsoluteFsPath): Buffer;                                             
node_modules/@angular/compiler-cli/src/ngtsc/file_system/src/node_js_file_system.d.ts:11:52 - error 
TS2591: Cannot find name 'Buffer'. Do you need to install type definitions for node? Try `npm i 
@types/node` and then add `node` to the types field in your tsconfig.

11     writeFile(path: AbsoluteFsPath, data: string | Buffer, exclusive?: boolean): void;

I'm completely stuck on how to solve this. Any suggestions for resolving this issue?

Answer №1

Once @types/node has been successfully installed, remember to modify the tsconfig.app.json file by adding

"types": ["node"]
within the compilerOptions section.

  "extends": "./tsconfig.json",
  "compilerOptions": {
    "outDir": "./out-tsc/app",
    "types": ["node"]
  },
  "files": ["src/main.ts"],
  "include": ["src/**/*.d.ts"],
  "exclude": ["src/test.ts", "src/**/*.spec.ts"]
}

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