I wanted to try staging.vuejs .html#with-build-tools and it said that I only need to install it with mand npm init vue@latest but I got this error :

SPEC

Node : v12.13.0

@vue/cli : v4.5.15

I wanted to try staging.vuejs https://staging.vuejs/guide/quick-start.html#with-build-tools and it said that I only need to install it with mand npm init vue@latest but I got this error :

SPEC

Node : v12.13.0

@vue/cli : v4.5.15

• javascript
• vue.js
• npm

• have you googled process.env.npm_config_user_agent ?? are you behind a proxy? – mahatmanich Commented Jan 31, 2022 at 9:01

1 Answer 1

The error is because your Node version simply doesn't know what ?? means.

The ?? is a null coalescing operator. Looking at the MDN docs for ??, you can see at the bottom that support for it was only added in Node 14.0. You're using Node v12.13.

There is really no other solution than to upgrade. I advice you to upgrade to the latest LTS version, which as of this writing is 16.