npmが実行できなくて詰まった話(アンインストールから再インストールまで) ref: https://qiita.com/yoshi1125hisa/items/4db4e15840c4a5c27d03

file0.txt

$ npm install -g jsx
Unhandled rejection Error: EACCES: permission denied, open '/Users/UserName/.npm/_cacache/index-v5/3d/40/1fc7c6f64e0d481b6e19f1d1ebffb32265d1b9ef080c9667bdedb0df3612'

npm ERR! cb() never called!

npm ERR! This is an error with npm itself. Please report this error at:
npm ERR! <https://github.com/npm/npm/issues>

npm ERR! A complete log of this run can be found in:
npm ERR! /Users/UserName/.npm/_logs/2018-07-05T06_32_41_539Z-debug.log

file1.txt

$ sudo npm uninstall npm -g

file2.txt

$ sudo rm -rf ~/.npm

file3.txt

$ brew uninstall node.js

file4.txt

lsbom -f -l -s -pf /var/db/receipts/org.nodejs.pkg.bom \
| while read i; do
  sudo rm /usr/local/${i}
done
sudo rm -rf /usr/local/lib/node \
     /usr/local/lib/node_modules \
     /var/db/receipts/org.nodejs.*

file5.txt

$ nodebrew install-binary latest
$ nodebrew ls
$ nodebrew use v10.6.0