You have two options:

1-automatically:

this will install the right version

npm install typescript@">=3.4.0 and <3.5.0" --save-dev

2-manually:

go to package.json and change your typescript version, If you want to upgrade your angular project to

Angular 13 (npm install typescript@"~4.4.0" --save-dev)

"devDependencies": {
  ...
  "typescript": "~4.4.0"
}

Angular 12 (npm install typescript@"~4.2.0" --save-dev)

"devDependencies": {
  ...
  "typescript": "~4.2.0"
}

Angular 11 (npm install typescript@"~4.0.0" --save-dev)

"devDependencies": {
  ...
  "typescript": "~4.0.0"
}

Angular 10 (npm install typescript@"~3.8.0" --save-dev)

"devDependencies": {
  ...
  "typescript": "~3.8.0"
}

Angular 9 (npm install typescript@"~3.7.0" --save-dev)

"devDependencies": {
  ...
  "typescript": "~3.7.0"
}

Angular 8 (npm install typescript@"~3.4.0" --save-dev)

"devDependencies": {
  ...
  "typescript": "~3.4.0"
}

Angular 7 (npm install typescript@"~3.1.0" --save-dev)

"devDependencies": {
  ...
  "typescript": "~3.1.0"
}

Angular 6 (npm install typescript@"~2.9.0" --save-dev)

"devDependencies": {
  ...
  "typescript": "~2.9.0"
}

Angular 4 (npm install typescript@"~2.2.0" --save-dev)

"devDependencies": {
  ...
  "typescript": "~2.2.0"
}

Then run:

npm install 

use this command its work for me.. Thanks

npm i typescript@">=3.6.4 <3.8.0"

If you want to upgrade your angular project to Angular 11

npm install typescript@">=4.0.0 and <4.2.0" --save-dev

In package.json :

"devDependencies": {
      ...
      "typescript": "^4.1.5"
 }

In my case I received this error when migrating from Angular 10 to Angular 11.

An unhandled exception occurred: The Angular Compiler requires TypeScript >=4.0.0 and <4.2.0 but 4. 2.3 was found instead.

To resolve this issue I used this code in Visual Studio where my Angular project exist:

npm install typescript@'>==4.0.0 <4.2.0'

When I had a similar error, I run:

yarn clean cache

If you use npm you can try to run:

npm clean cache

I'm not sure that is a 100% solution, but I hope it can help someone.

Instead of "typescript": "^3.4.5" under devDependencies in your package.json file enter "typescript": "~3.4.5" and save the file, then run npm install again. It worked for me.

Using Angular 11 use

npm i -D typescript@4.0.5

Please uninstall typescript by using the following command:

npm uninstall typescript

and then install typescript specific version:

npm i --save-dev typescript@3.4.5

This issue is mainly depended on @angular/cli version so typescript is depend on angular version

when you update angular check this website(devDependency)

https://david-dm.org/angular/angular-cli

and do

npm i --save-dev typescript@3.4.5

3.4.5version is required

Run this:

npm i --save-dev typescript@~3.4.5

Run this script to find exact version

npm install typescript@">=3.4.0 and <3.5.0" --save-dev

You don't need to uninstall and again install the typescript so you can install the specific version of typescript as recommended in the error.

npm install typescript@ version

or you can run

npm install typescript@ version --save-dev

to save it in the package json

I was getting this problem in my Angular 9 as well, but with different version numbers.

ERROR in The Angular Compiler requires TypeScript >=3.6.4 and <3.8.0 but 3.8.2 was found instead.

What I did was,

1. Went to the Angular 9 breaking changes
2. Searched for typescript version and found that it supports only 3.7
3. Edit my typescript version in package.json as "typescript": "~3.7.0"
4. ran npm i

The ~ here is important as it will make sure that it will update only to the next patch version (<3.8.0), not to the minor versions, if you use ^ it will update to minor versions too(for example, 4.0.0).

Your wrong is "^" "typescript": "^3.4.0" in your package.json

the solution is "typescript": "~3.4.0"

Good news!

You can use TypeScript 3.5 if you upgrade to Angular 8.2+. Version 8.1 didn't support it just yet.

Proof: https://github.com/angular/angular-cli/issues/15134#issuecomment-516908416