npm cant change Jasmine package version - npm

Question

if I run npm view jasmine version or npm view jasmine version -g from ~ the version returned is 3.3.1
I need the version to be 2.8.0 so i try to downgrade with npm install jasmine#2.8.0 -g but npm view jasmine version is still 3.3.1
Now if i do npm list -g i see the correct version for jasmine (2.8.0)... So where is the 3.3.1 coming from?
├─┬ jasmine#2.8.0
│ ├── exit#0.1.2
│ ├─┬ glob#7.1.3
│ │ ├── fs.realpath#1.0.0
│ │ ├─┬ inflight#1.0.6
│ │ │ ├── once#1.4.0 deduped
│ │ │ └── wrappy#1.0.2
│ │ ├── inherits#2.0.3
│ │ ├─┬ minimatch#3.0.4
│ │ │ └─┬ brace-expansion#1.1.11
│ │ │ ├── balanced-match#1.0.0
│ │ │ └── concat-map#0.0.1
│ │ ├─┬ once#1.4.0
│ │ │ └── wrappy#1.0.2 deduped
│ │ └── path-is-absolute#1.0.1
│ └── jasmine-core#2.8.0

Answer 1

Understanding the npm view command:
When you run either of the following npm view commands:
npm view jasmine version
or
npm view jasmine version -g
you are sending a GET request to the npm registry. More specifically you are sending a request to the following endpoint:
https://registry.npmjs.org/jasmine
You can verify this by appending the -d option to your command for additional logging information. For instance, if you run;
npm view jasmine version -d
you'll see additional information in your log which includes something like the following:
npm http request GET https://registry.npmjs.org/jasmine
Note: This line above indicates the endpoint which your view command is making the request to.
So where is the 3.3.1 coming from?
3.3.1 is the latest version of the jasmine package available in the npm registry. The result of any view command does not indicate information about packages installed on your system, instead it returns information (metadata) about packages held in the npm registry.
You'll continue to see version 3.3.1 logged to your console when running;
npm view jasmine version
(from any directory location on your system), until a newer version of jasmine is published to the npm registry.
Additional Notes:
The two npm commands that you are running, namely:
npm view jasmine version
and
npm view jasmine version -g
are effectively the same command. The view command does not provide a -g option. The -g option is simply being ignored.
The npm list command, (as you've already discovered), should be utilized for retrieving information about packages that are installed on your system. Hence that why its indicating your expected result(s).