yarn add save dev dependency code example
Example 1: add dev dependency yarn
yarn add -D package
//or
yarn add --dev package
Example 2: yarn save dev
yarn add [--dev/-D]
Example 3: yarn add --save-exact
yarn add [--exact/-E]
yarn add -D package
//or
yarn add --dev package
yarn add [--dev/-D]
yarn add [--exact/-E]