How to find out this information about Webpack?

Question

webpack

Hello.
Faced such a problem.
Zayuzal vue-cli (not 3rd). I started setting up the MiniCssExtractPlugin plugin in webpack.config.js.
npm run build gives an error:

const { Template, util: { createHash } } = _webpack2.default;
                          ^
TypeError: Cannot destructure property `createHash` of 'undefined' or 'null'.

It seems that they write on the forums that you need to update the webpack and the problem will be fixed.
In this regard, a few questions:

1. How can I find out the current version of webpack? ( webpack -v gives - webpack: command not found
   
2. Is there any way to know if webpack is installed globally or locally?
   
3. How to update webpack (what exactly is this command?)
   

PS: I have Linux Mint

Answer 1

How can I find out the current version of webpack? ( webpack -v gives - webpack: command not found

in the project directory writenpm list webpack
locally npm list webpack
globallynpm list webpack -g --depth 0
npm remove webpack -D && npm i webpack -D