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richdayandnight / tutorial-gitbook-learning-how-to-learn

https://richdayandnight.github.io/tutorial-gitbook-learning-how-to-learn/
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error when I enter ` yarn add gulp gulp-gh-pages gulp-load-plugins --save-dev` #6

Closed liusy58 closed 2 years ago

liusy58 commented 2 years ago

Hi, When I enter the command yarn add gulp gulp-gh-pages gulp-load-plugins --save-dev, the erorr message shows below:

Usage: yarn [options]

yarn: error: no such option: --save-dev
liusy58 commented 2 years ago

any help?