the error npm ERR! shasum check failed and npm ERR! Unexpected end of JSON input while parsing near'....' , will be solved by switching npm reigistry from the list of given npm registry.
List of Npm registry:
- https://registry.npmjs.org/ (Dfault One)
To switch just type
npm config set registry "https://registry.npmjs.com/"
Replace the registry url with the above urls check which one works for you.
npm cache clear --force
npm verify cache
now error will be solved.