ERROR in The Angular Compiler requires TypeScript 3 1 1 and 3 2 0 but 3 2 1 was found instead

Question

I am getting this error     ERROR in The Angular Compiler requires TypeScript   3 1 1 and  lt 3 2 0 but 3 2 1 was found instead    Seems like Typescript updated but the Angular Compiler doesn t like that   How do I fix this

User · Answer

If you want to use Angular with an unsupported TypeScript version  add this to your tsconfig json to ignore the warning      angularCompilerOptions          disableTypeScriptVersionCheck   true

User · Answer

Got a similar error from CircleCi s error log     ERROR in The Angular Compiler requires TypeScript   3 1 1 and  lt 3 3 0 but 3 3 3333 was found instead    Just so you know this did not affect the Angular application  but the CircleCi error was becoming annoying  I am running Angular 7 1  I ran      npm i typescript 3 1 6 --save-dev --save-exact  to update the package-lock json file     Then I ran    npm i  After that I ran     npm audit fix   This CircleCi error message  went away    So it works

User · Answer

npm install typescript   gt  3 1 1  lt 3 3 0  --save-dev --save-exact rm -rf node modules npm install

User · Answer

To fix this install the specific typescript version 3 1 6  npm i typescript 3 1 6 --save-dev --save-exact

User · Answer

I also faced similar issues when tried to do ng serve  I was able to resolve it as below   Note    C  Windows system32 gt  is on windows command prompt C  apps workspace testProj gt   is on VS code Terminal  can also be doable in another command prompt    Following are the steps which I used to resolve this  Step1  Verify the cli version installed on command prompt  will be Angular CLI global version   C  Windows system32 gt ng --version   Angular CLI  8 3 13  If cli was installed earlier  it shows the global cli version   If cli was not installed  we may get the error  ng is not recognized as an internal or external command  a   Optional Step  Install Angular CLI global version  C  Windows system32 gt npm install -g  angular cli C  Windows system32 gt npm install -g  angular-cli latest   b  Check version again  C  Windows system32 gt ng --version Angular CLI  8 3 13   Step2  Verify the local cli version installed on your angular project VS code ide or command prompt cd d to your project project   C  apps workspace testProj gt ng --version Angular CLI  7 3 8   Note  Clearly versions are not in sync  Do the following in your angular project   C  apps workspace testProj gt ng update  angular cli        - gt  important to sync with global cli version   Note  If upgrade donot work using above command  ref  How to upgrade Angular CLI to the latest version  On command prompt  uninstall global angular cli  clean the cache and reinstall the cli  C  Windows system32 gt npm uninstall -g angular-cli C  Windows system32 gt npm cache clean or npm cache verify   if npm  gt  5  C  Windows system32 gt npm install -g  angular cli latest   Now update your local project version  because cli version of your local project is having higher priority than global one when you try to execute your project   C  apps workspace testProj gt rm -rf node modules C  apps workspace testProj gt npm uninstall --save-dev angular-cli C  apps workspace testProj gt npm install --save-dev  angular cli latest C  apps workspace testProj gt npm install C  apps workspace testProj gt ng update  angular cli   Step3  Verify if local project cli version now in sync with global one  C  Windows system32 gt ng --version Angular CLI  8 3 13  C  apps workspace testProj gt ng --version Angular CLI  8 3 13   Step4   Revalidate on the project  C  apps workspace testProj gt ng serve   Should work now

User · Answer

ERROR in The Angular Compiler requires TypeScript   3 4 0 and  lt 3 6 0 but 3 6 3 was found instead    For this error you can also define a version range   yarn add typescript   gt  3 4 0  lt 3 6 0  --save-dev --save-exact   or for npm  npm install typescript   gt  3 4 0  lt 3 6 0  --save-dev --save-exact   After installing the correct typescript version    Delete node modules folder Run yarn install or npm install Compile and cross your fingers xD

User · Answer

For following Error      ERROR in The Angular Compiler requires TypeScript   3 4 0 and  lt 3 6 0   but 3 6 3 was found instead    Run following NPM command     npm install typescript 3 5 3   Source Link

User · Answer

In my case below command worked for windows  It will install latest required version between 3 1 1 and 3 2 0  Depending on OS use either double or single quotes  npm install typescript   gt  3 1 1  lt 3 2 0

User · Answer

First install your targeted version   npm i typescript 3 1 6 --save-dev --save-exact   Then before compiling do      npm i

[angular] ERROR in The Angular Compiler requires TypeScript >=3.1.1 and <3.2.0 but 3.2.1 was found instead

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