Typescript: TS2304: Cannot find name 'JSON'

[sdeering]

Potential bug when upgrading to Angular 7 and Typescript 3.2.0. Using IntelliJ.

TS2304: Cannot find name 'JSON'

[sdeering]

Deleting node_modules and npm install seems to have fixed it.

[rhythm010]

Even after deleting node modules and then doing npm install, the error persists.

[makkasi]

Same for me. Reinstall with npm doesn't work.

[geiseri]

I just hit this too for a new project. I have another project that works, but I am running code-server with typescript 3.4.4 building with webpack for node 8. So there are a lot of moving parts. I am going to try to break it down and see if there is rhyme or reason. I see this reported on other projects, and usually, the solution for some people involves a mixture of tsconfig.json tweaks to the library target and installing specific @type/ packages. There doesn't seem to be consistency though, so I think it is a tooling configuration problem.

[strass]

I'm hitting the same issue as @geiseri
I also see Cannot find name 'document'. Do you need to change your target library? Try changing thelibcompiler option to include 'dom'.ts(2584) even when my lib entry in tsconfig.json includes dom

[silasdavis]

I fixed this on an es5 project by adding "es5" to tsconfig.json at compilerOptions.lib:

{
  "files": [
    "src/index.ts"
  ],
  "compilerOptions": {
    "target": "es5",
    "module": "es2015",
    "lib": [
      "es5",
      "dom"
    ]
  }
}