unable to verify the first certificate when running npm install

Question

I'm was looking at the Angular2 tutorial on: https://github.com/angular/quickstart/blob/master/README.md

However, when I run the npm install as per the guide, i initially got an error related to UNABLE_TO_VERIFY_LEAF_SIGNATURE . Which on googling seemed related to SSL cert so I then attempted to just get around this by using the following command:

npm config set strict-ssl false

I then retried npm install

This got a bit further but then got new errors related to "unable to verify the first certificate":

 typings ERR! message Unable to connect to "https://api.typings.org/entries/dt/core-js/tags/0.0.0%2B20160725163759" typings ERR! caused by unable to verify the first certificate typings ERR! cwd c:\\Code\\Angular2\\Quickstart typings ERR! system Windows_NT 6.1.7601 typings ERR! command "C:\\\\Program Files\\\\nodejs\\\\node.exe" "c:\\\\Code\\\\Angular2\\\\Quickstart\\\\node_modules\\\\typings\\\\dist\\\\bin.js" "install" typings ERR! node -v v6.7.0 typings ERR! typings -v 1.4.0 typings ERR! code EUNAVAILABLE typings ERR! If you need help, you may report this error at: typings ERR! <https://github.com/typings/typings/issues> npm WARN optional Skipping failed optional dependency /chokidar/fsevents: npm WARN notsup Not compatible with your operating system or architecture: fsevents@1.0.14 npm WARN angular-quickstart@1.0.0 No license field. npm ERR! Windows_NT 6.1.7601 npm ERR! argv "C:\\\\Program Files\\\\nodejs\\\\node.exe" "C:\\\\Program Files\\\\nodejs\\\\node_modules\\\\npm\\\\bin\\\\npm-cli.js" "install" npm ERR! node v6.7.0 npm ERR! npm v3.10.3 npm ERR! code ELIFECYCLE npm ERR! angular-quickstart@1.0.0 postinstall: `typings install` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the angular-quickstart@1.0.0 postinstall script 'typings install'. npm ERR! Make sure you have the latest version of node.js and npm installed. npm ERR! If you do, this is most likely a problem with the angular-quickstart package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! typings install npm ERR! You can get information on how to open an issue for this project with: npm ERR! npm bugs angular-quickstart npm ERR! Or if that isn't available, you can get their info via: npm ERR! npm owner ls angular-quickstart npm ERR! There is likely additional logging output above. npm ERR! Please include the following file with any support request: npm ERR! c:\\Code\\Angular2\\Quickstart\\npm-debug.log

I'm new to NodeJS and Angular2 development. Any ideas ? If I have missed out any detail then let me know.

Answer 1

In my case adding the ca-file in .npmrc to the corporate proxy certificate was the solution:

npm config set cafile "path to proxy cert file"

or insert with editor in .npmrc:

cafile=<path to proxy cert file>

The .npmrc file is located in the home directory.

Answer 2

您可以尝试将注册表更改为config中的http版本

npm config set registry http://registry.npmjs.org/ --global

Answer 3

I was able to resolve the issue by using the instructions here: https://github.com/typings/typings/issues/564

The issue is ultimately related to my machine being behind some corporate proxy which seems to be related to npm unable to authenticate https against the proxy. Since I didn't have any further information about the proxy being used so was unable to configure as per @leetibbett suggestion above. So I created .typingsrc file in the root directory to use http version:

{
     "rejectUnauthorized": false,
     "registryURL": "http://api.typings.org/"
}

Answer 4

I uninstalled the node Js 12 and reinstalled the version 10. That solved my problem. I am not sure if the problem was the version, but you can try. I hope that has helped you.