Creating a TypeScript app with --typescript option does not work

[nareshbhatia]

Is this a bug report?

Yes

Did you try recovering your dependencies?

N/A

Which terms did you search for in User Guide?

TypeScript

Environment

Environment Info:

System:
OS: macOS Sierra 10.12.6
CPU: x64 Intel(R) Core(TM) i7-4850HQ CPU @ 2.30GHz
Binaries:
Node: 11.2.0 - /usr/local/bin/node
Yarn: 1.12.3 - /usr/local/bin/yarn
npm: 6.4.1 - /usr/local/bin/npm
Browsers:
Chrome: 70.0.3538.102
Firefox: 60.0.2
Safari: 12.0.1
npmPackages:
react: ^16.6.3 => 16.6.3
react-dom: ^16.6.3 => 16.6.3
react-scripts: 2.1.1 => 2.1.1
npmGlobalPackages:
create-react-app: Not Found

Steps to Reproduce

(Write your steps here:)

1. npx create-react-app my-app --typescript

Expected Behavior

A TypeScript app is created with .tsx files

Actual Behavior

An ES6 app is created with .js files

Reproducible Demo

N/A

[miraage]

Your local create-react-app "binary" must be quite old (v1.x). Try to update it to the latest version npm install --global create-react-app.

[brunolemos]

Hi! Please run npx create-react-app --version, make sure it's at least 2.1.

If not, run npm i -g create-react-app like @miraage mentioned.

After doing this, it will work as expected.

[nareshbhatia]

Thanks @miraage & @brunolemos. Turns out that I did not have create-react-app installed in global. Somehow I thought that it was not required when using npx. As soon as I installed it, I was able to create a typescript app.

Thanks for your help.

[brunolemos]

@nareshbhatia it's not required, but sometimes it ends up using an existing version on your machine instead of the newest one

[nareshbhatia]

Ah, I see. Thanks for clarifying, @brunolemos.