blocks|key|2767283|text|++++#+first+this
++++>+npm+config+rm+proxy
++++>+npm+config+rm+https-proxy

++++#+then+this
++++>+npm+config+set+registry+https://registry.npmjs.org/|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2767284|解决了我的问题。|unstyled|2767285|再次：一定要检查您是否已正确连接互联网。|offset|length|style|BOLD|2767286|entityMap^0|0|0|2|1|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|F|7|T|8|@]|9|@]|A|$]]]|N|$]]

<pre class="lang-sh prettyprint-override"><code> # first this
 &gt; npm config rm proxy
 &gt; npm config rm https-proxy

 # then this
 &gt; npm config set registry https://registry.npmjs.org/
</code></pre>
solved my problem.
Again: Be sure to check whether you have internet connected properly.

blocks|key|1474457|text|尝尝这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1474458|npm+config+rm+proxy
npm+config+rm+https-proxy|code-block|syntax|javascript|1474459|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try this

<pre><code>npm config rm proxy
npm config rm https-proxy
</code></pre>

blocks|key|2766938|text|在我的例子中，我必须直接编辑.npmrc并手动添加代理设置。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2766939|proxy=http://yourorganizationproxy.com:8080
https-proxy=http://yourorganizationproxy.com:8080|code-block|syntax|javascript|2766940|希望这能帮上忙。|2766941|entityMap^0|E|6|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

In my case I had to edit the <code>.npmrc</code> directly and add the proxy settings manually.
<pre><code>proxy=http://yourorganizationproxy.com:8080
https-proxy=http://yourorganizationproxy.com:8080
</code></pre>
Hope this helps someone.

blocks|key|2766844|text|原因可能是您的现行国家预防机制登记册。尝试检查是否有文件。这些活动可在不同地点进行：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2766845|每个项目配置文件(/path/to/my/project/.npmrc)|unordered-list-item|style|CODE|2766846|每个用户配置文件(~/.npmrc)|2766847|全局配置文件($PREFIX/etc/npmrc)|2766848|npm内置配置文件(/path/to/npm/npmrc)|2766849|在这些里面可能有类似的东西|2766850|registry=https://mycustomregistry.example.org|code-block|syntax|javascript|2766851|它将优先于默认的(http://registry.npmjs.org/)。您可以删除文件中的这一行，或者使用默认注册表，如下所示：|2766852|npm+<command>+--registry+http://registry.npmjs.org/|2766853|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.npmjs.com/misc/registry|1|https://docs.npmjs.com/files/npmrc^0|7|B|0|Q|2|1|0|9|Q|0|9|8|0|7|H|0|A|I|0|0|0|9|Q|0|0^^$0|@$1|2|3|4|5|6|7|19|8|@]|9|@$A|1A|B|1B|1|1C]|$A|1D|B|1E|1|1F]]|C|$]]|$1|D|3|E|5|F|7|1G|8|@$A|1H|B|1I|G|H]]|9|@]|C|$]]|$1|I|3|J|5|F|7|1J|8|@$A|1K|B|1L|G|H]]|9|@]|C|$]]|$1|K|3|L|5|F|7|1M|8|@$A|1N|B|1O|G|H]]|9|@]|C|$]]|$1|M|3|N|5|F|7|1P|8|@$A|1Q|B|1R|G|H]]|9|@]|C|$]]|$1|O|3|P|5|6|7|1S|8|@]|9|@]|C|$]]|$1|Q|3|R|5|S|7|1T|8|@]|9|@]|C|$T|U]]|$1|V|3|W|5|6|7|1U|8|@$A|1V|B|1W|G|H]]|9|@]|C|$]]|$1|X|3|Y|5|S|7|1X|8|@]|9|@]|C|$T|U]]|$1|Z|3|-4|5|6|7|1Y|8|@]|9|@]|C|$]]]|10|$11|$5|12|13|14|C|$15|16]]|17|$5|12|13|14|C|$15|18]]]]

The cause for this might be your <a href="https://docs.npmjs.com/misc/registry" rel="noreferrer">current NPM registry</a>. Try to check for a <a href="https://docs.npmjs.com/files/npmrc" rel="noreferrer"><code>.npmrc</code> file</a>. These can be at various locations:

<ul>
<li>per-project config file (<code>/path/to/my/project/.npmrc</code>)</li>
<li>per-user config file (<code>~/.npmrc</code>)</li>
<li>global config file (<code>$PREFIX/etc/npmrc</code>)</li>
<li>npm builtin config file (<code>/path/to/npm/npmrc</code>)</li>
</ul>

Within these there can be something like

<pre><code>registry=https://mycustomregistry.example.org
</code></pre>

which will take priority over the default one (<code>http://registry.npmjs.org/</code>). You can delete this line in the file or use the default registry like that:

<pre><code>npm &lt;command&gt; --registry http://registry.npmjs.org/
</code></pre>

blocks|key|2805905|text|最有可能是npm注册中心，但npm无法到达。检查npm代理配置|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2805906|我在Windows+2008+R2上也有同样的问题。起初，我怀疑internet的增强安全性配置，但在关闭它之后，最终发现的问题是npm没有配置为使用我的公司代理连接到互联网。|2805907|结果表明，npm并没有通过Internet选项>+Connections选项卡>+LAN设置来使用代理设置，其中服务器被设置为“自动检测设置”。设置为自动检测设置并不能保证代理确实被使用，这只是意味着，如果在http://wpad.[yourdomain.com]/wpad.dat上找到一个特殊的‘wpad.dat’文件，Windows将自动为Internet配置代理设置。|2805908|您可以通过在web浏览器中键入以下内容来测试组织中是否正在使用wpad.dat文件。|2805909|http://wpad.[yourcompany.domain]/wpad.dat|code-block|syntax|javascript|2805910|如果没有可用的文件，那么很可能您没有使用组织范围的代理。如果一个人被送回浏览器那么..。|2805911|在这个文件的底部，您应该看到一行|2805912|PROXY+<host:port>;|2805913|如果您有多个可用的代理，则可能会重复。为了告诉npm使用以下代理设置，需要主机和端口：|2805914|npm+config+set+proxy+http://[host]:[port]|2805915|和|2805916|npm+config+set+https-proxy+http://[host]:[port]|2805917|例如，如果您的代理位于端口8080的my.proxy.com上，那么npm命令将是：|2805918|npm+config+set+proxy+http://my.proxy.com:8080
npm+config+set+https-proxy+http://my.proxy.com:8080|2805919|有一次，我告诉npm使用哪种代理开始工作，我就能够运行安装命令，没有问题。|2805920|感谢下面的帖子帮助您发现wpad文件。|2805921|entityMap|0|LINK|mutability|MUTABLE|url|http://wpad.[yourdomain.com]/wpad.dat|1|https://superuser.com/questions/346372/how-do-i-know-what-proxy-server-im-using^0|0|V|0|0|2W|11|0|0|0|0|0|0|0|0|0|0|0|0|0|0|5|2|1|0^^$0|@$1|2|3|4|5|6|7|1M|8|@$9|1N|A|1O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1P|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|1Q|8|@]|D|@$9|1R|A|1S|1|1T]]|E|$]]|$1|J|3|K|5|6|7|1U|8|@]|D|@]|E|$]]|$1|L|3|M|5|N|7|1V|8|@]|D|@]|E|$O|P]]|$1|Q|3|R|5|6|7|1W|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|1X|8|@]|D|@]|E|$]]|$1|U|3|V|5|N|7|1Y|8|@]|D|@]|E|$O|P]]|$1|W|3|X|5|6|7|1Z|8|@]|D|@]|E|$]]|$1|Y|3|Z|5|N|7|20|8|@]|D|@]|E|$O|P]]|$1|10|3|11|5|6|7|21|8|@]|D|@]|E|$]]|$1|12|3|13|5|N|7|22|8|@]|D|@]|E|$O|P]]|$1|14|3|15|5|6|7|23|8|@]|D|@]|E|$]]|$1|16|3|17|5|N|7|24|8|@]|D|@]|E|$O|P]]|$1|18|3|19|5|6|7|25|8|@]|D|@]|E|$]]|$1|1A|3|1B|5|6|7|26|8|@]|D|@$9|27|A|28|1|29]]|E|$]]|$1|1C|3|-4|5|6|7|2A|8|@]|D|@]|E|$]]]|1D|$1E|$5|1F|1G|1H|E|$1I|1J]]|1K|$5|1F|1G|1H|E|$1I|1L]]]]

Most likely to be npm registry cannot be reached by npm. Check npm proxy configuration

I had exactly the same issue on Windows Server 2008 R2. I suspected Internet Explorer's Enhanced Security Configuration at first but after turning that off with no success the issue turned out to be that npm was not configured to use my corporate proxy connection to the internet. 

It turns out that npm does not use the proxy settings in effect via Internet Options > Connections tab > LAN settings where the server is set to 'Automatically detect settings'. Being set to automatically detect settings does not guarantee that a proxy is indeed being used, it just means that Windows will automatically configure proxy settings for Internet Explorer if it finds a special'wpad.dat' file at <a href="http://wpad.[yourdomain.com]/wpad.dat" rel="noreferrer">http://wpad.[yourdomain.com]/wpad.dat</a>. 

You can test whether a wpad.dat file is in use in your organisation by typing the following into a web browser.

<pre><code>http://wpad.[yourcompany.domain]/wpad.dat
</code></pre>

If no file is available then it is likely you are not using an organization-wide proxy. If one does get returned to the browser then...

Toward the bottom of this file, you should see a line saying 

<pre><code>PROXY &lt;host:port&gt;;
</code></pre>

It might be repeated if you have multiple proxies available. The host and port are needed in order to tell npm to use the proxy settings like so:

<pre><code>npm config set proxy http://[host]:[port]
</code></pre>

and

<pre><code>npm config set https-proxy http://[host]:[port]
</code></pre>

For example if your proxy is at my.proxy.com on port 8080 then the npm commands would be:

<pre><code>npm config set proxy http://my.proxy.com:8080
npm config set https-proxy http://my.proxy.com:8080
</code></pre>

Once I had told npm which proxy to use all started working in I was able to run the install commands without a problem.

Thanks to the following <a href="https://superuser.com/questions/346372/how-do-i-know-what-proxy-server-im-using">post</a> for help with the wpad file discovery.

blocks|key|1475182|text|在我的例子中，我将npm的注册表设置为https://nexus，使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1475183|npm+config+delete+registry|code-block|syntax|javascript|1475184|这将恢复到默认状态。|1475185|entityMap|0|LINK|mutability|MUTABLE|url|https://nexus/^0|J|D|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

In my case I had my npm set registry set to https://nexus, use:
<pre><code>npm config delete registry
</code></pre>
This will revert to its default state.

blocks|key|1474420|text|我试着用下面的选项来解决这个问题，结果成功了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1474421|卸载Node.js版本8。|ordered-list-item|1474422|安装Node.js版本6.11.4|1474423|使用注册表选项和命令安装任何包。|offset|length|1474424|例如，为了安装express，我使用了以下命令。|1474425|npm+install+express+--registry+http://registry.npmjs.org/|code-block|syntax|javascript|1474426|或|1474427|npm+install+express+-g+--registry+http://registry.npmjs.org/|1474428|如果要在任何特定文件夹中本地安装，请使用以下命令。下面的命令将在路径C:\Sample\Example1上安装express。|style|CODE|1474429|C:\Sample1\Example1>+npm+install+/Sample/Example1+express+--registry+http://registry.npmjs.org/|1474430|注意：，如果您正在本地安装某个特定位置，那么首先使用命令转到该目录，然后运行上面的命令。如果您不在该目录中，并且只在命令中给出不起作用的路径。|BOLD|1474431|如果您得到了package.json丢失的错误，那么在本地安装包之前运行下面的命令|1474432|C:\Sample\Example1>+npm+init|1474433|上面的命令将创建package.json文件。不需要提供任何数据。按回车。|1474434|注意:如果您在防火墙后面，则可能需要设置代理。|1474435|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.npmjs.com/misc/registry^0|0|0|0|2|5|0|0|0|0|0|0|Y|I|0|0|0|3|0|6|C|0|0|8|C|0|0|N|0^^$0|@$1|2|3|4|5|6|7|1K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1L|8|@]|9|@]|A|$]]|$1|E|3|F|5|D|7|1M|8|@]|9|@]|A|$]]|$1|G|3|H|5|D|7|1N|8|@]|9|@$I|1O|J|1P|1|1Q]]|A|$]]|$1|K|3|L|5|6|7|1R|8|@]|9|@]|A|$]]|$1|M|3|N|5|O|7|1S|8|@]|9|@]|A|$P|Q]]|$1|R|3|S|5|6|7|1T|8|@]|9|@]|A|$]]|$1|T|3|U|5|O|7|1U|8|@]|9|@]|A|$P|Q]]|$1|V|3|W|5|6|7|1V|8|@$I|1W|J|1X|X|Y]]|9|@]|A|$]]|$1|Z|3|10|5|O|7|1Y|8|@]|9|@]|A|$P|Q]]|$1|11|3|12|5|6|7|1Z|8|@$I|20|J|21|X|13]]|9|@]|A|$]]|$1|14|3|15|5|6|7|22|8|@$I|23|J|24|X|Y]]|9|@]|A|$]]|$1|16|3|17|5|O|7|25|8|@]|9|@]|A|$P|Q]]|$1|18|3|19|5|6|7|26|8|@$I|27|J|28|X|Y]]|9|@]|A|$]]|$1|1A|3|1B|5|6|7|29|8|@$I|2A|J|2B|X|13]]|9|@]|A|$]]|$1|1C|3|-4|5|6|7|2C|8|@]|9|@]|A|$]]]|1D|$1E|$5|1F|1G|1H|A|$1I|1J]]]]

I tried following options to fix this issue and it worked.

<ol>
<li>Uninstall Node.js version 8.</li>
<li>Install Node.js version 6.11.4</li>
<li>Use the <a href="https://docs.npmjs.com/misc/registry" rel="noreferrer">registry option</a> along with command to install any package.</li>
</ol>

For example to install express I used following command.

<pre><code>npm install express --registry http://registry.npmjs.org/
</code></pre>

or 

<pre><code>npm install express -g --registry http://registry.npmjs.org/
</code></pre>

If you want to install locally in any specific folder then use below command. Below command will install express on path <code>C:\Sample\Example1</code> .

<pre><code>C:\Sample1\Example1&gt; npm install /Sample/Example1 express --registry http://registry.npmjs.org/
</code></pre>

Note: If you are installing locally in a specific location then first go to that directory using command and then run above command. If you are not inside that directory and giving only path in command that will not work.

If you get <code>package.json</code> missing error then run below command before installing package locally

<pre><code>C:\Sample\Example1&gt; npm init
</code></pre>

above command will create <code>package.json</code> file. No need to provide any data. just hit enter.

Note: If you are behind a firewall then you may need to set a proxy.

blocks|key|1474568|text|嗨，我也是个新手，在遇到这么多麻烦之后，我也遇到了这个问题:只需在命令提示符或终端中运行：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1474569|npm+config+set+registry+http://registry.npmjs.org/|offset|length|style|CODE|1474570|这将解决你的问题。参考链接：http://blog.csdn.net/zhalcie2011/article/details/78726679|1474571|entityMap|0|LINK|mutability|MUTABLE|url|http://blog.csdn.net/zhalcie2011/article/details/78726679^0|0|0|1E|0|E|1L|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@$D|T|E|U|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|V|8|@]|9|@$D|W|E|X|1|Y]]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]]]

Hi I'm also new to react and I also faced this problem after so many trouble I found solution: Just run in your command prompt or terminal : 

<code>npm config set registry http://registry.npmjs.org/</code>

This will resolve your problem. 
Reference link: <a href="http://blog.csdn.net/zhalcie2011/article/details/78726679" rel="nofollow noreferrer">http://blog.csdn.net/zhalcie2011/article/details/78726679</a>

blocks|key|1474847|text|确保您可以访问您在npm中配置的公司存储库是available.Check您的VPN连接。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1474848|否则，将其重置为默认存储库，如下所示。|1474849|npm+config+set+registry+http://registry.npmjs.org/|code-block|syntax|javascript|1474850|好运！！|1474851|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Make sure you can access the corporate repository you configured in npm is available.Check you VPN connection.

Else reset it back to default repository like below.

<pre><code>npm config set registry http://registry.npmjs.org/
</code></pre>

Good Luck!!

blocks|key|1475008|text|以下命令解决了我的问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1475009|npm+config+set+proxy+http://yourproxyurl.com:8080++(you+need+to+enter+your+or+your+company+proxy+URL+and+8080+should+be+replaced+by+your+proxy+port)

npm+config+set+https-proxy+http://yourproxyurl.com:8080|code-block|syntax|javascript|1475010|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The following commands resolved my issue:

<pre class="lang-sh prettyprint-override"><code>npm config set proxy http://yourproxyurl.com:8080 (you need to enter your or your company proxy URL and 8080 should be replaced by your proxy port)

npm config set https-proxy http://yourproxyurl.com:8080
</code></pre>

blocks|key|2767122|text|我也有同样的效果，用PhpStorm创建了一个react应用程序。最后，它只是说done。在终端中运行相同的命令会给我带来详细的错误。我创建的项目文件夹名为react，这似乎是一个“禁止”。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2767123|确保您的项目文件夹不命名为react。|2767124|entityMap^0|14|4|26|5|0|D|5|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|R|8|@]|D|@]|E|$]]]|I|$]]

I had the same effect creating a react app with PhpStorm. And then at the end it just says <code>done</code>. Running the same command in the terminal gave me detailed errors. The project folder I've created was named <code>react</code> which seems to be a no-go.

Make sure your project folder is not named <code>react</code>.

blocks|key|2766951|text|如果您可以访问注册表，但错误仍然发生，那么上面提到的任何事情都不会起作用。我注意到，这个问题只适用于本地项目的安装(也就是说，如果您使用-g进行全局安装，一切都正常)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2766952|解决问题的方法是:从项目的package.json文件中删除有关要安装的包的条目。在此之后，下一次对npm的调用将成功地工作并安装软件包。|2766953|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

If you have access to the registry but the error is still occurred nothing mentioned above wouldn't work. I noted that this problem is only applicable for local project's installation (i.e. if you use -g to global install everything is working fine).

What's resolved the problem for me: just remove an entry regarding a package you're going to install from a project's package.json file. After that next call to npm will work and install the package successfully.

blocks|key|2766985|text|这个问题似乎还没有解决。有些人工作，有些人不工作。我也没工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2766986|我用命令尝试了清除缓存：npm+cache+verify，然后再次运行安装命令。我工作了。|offset|length|style|CODE|2766987|1.+https://github.com/npm/npm/issues/17246|2766988|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/npm/npm/issues/17246^0|0|C|G|0|3|13|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@$D|T|E|U|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|V|8|@]|9|@$D|W|E|X|1|Y]]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]]]

Seem this bug is not fixed yet [1]. Some people get worked, some people not. I also get not worked.

I tried clear cache with command: <code>npm cache verify</code> then run install command again. I got worked.

[1]. <a href="https://github.com/npm/npm/issues/17246" rel="nofollow noreferrer">https://github.com/npm/npm/issues/17246</a>

blocks|key|2805866|text|我也有过同样的问题。但是，它可以通过从公司内部网络切换到访问者网络来正常运行。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2805867|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had the same issue. But it can run properly with switching from company's internal network to visitor network.

blocks|key|2805952|text|我设置了两个系统环境变量-|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2805953|HTTP_PROXY+=+<_proxy_url_>|ordered-list-item|2805954|HTTPS_PROXY+=+<_proxy_url_>|2805955|这对我来说是有效的。|2805956|entityMap^0|6|6|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$]]|$1|I|3|J|5|H|7|S|8|@]|D|@]|E|$]]|$1|K|3|L|5|6|7|T|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|N|$]]

I set two system environment variables -

<ol>
<li>HTTP_PROXY = &lt;_proxy_url_></li>
<li>HTTPS_PROXY = &lt;_proxy_url_></li>
</ol>

This actually worked for me.

blocks|key|1474868|text|在一些较少见的情况下，请检查项目是否可以使用常规的npm命令构建。我遇到了一个配置为与bower一起工作的系统，所以bower+install+<github_url>可以工作，而npm+install+<github_url>在所有平台上给出的错误信息都是无益的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1474869|entityMap^0|P|3|17|5|1M|Q|2I|O|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|G|$]]

In some rarer occasions, check that the project can be built using regular <code>npm</code> commands. I ran into one that is configured to work with <code>bower</code>, so <code>bower install &lt;github_url&gt;</code> works while <code>npm install &lt;github_url&gt;</code> gives that unhelpful cryptic error message on all platforms...

blocks|key|2806075|text|在安装角命令行工具(CLI)时，如果出现回滚错误，则可能是因为您的网络与您正在工作的客户端网络或公司网络连接。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2806076|因此，请尝试安装CLI在您的公共网络(或您的移动热点网络)，然后您肯定会安装CLI。|2806077|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

While installing the Angular Command line tool (CLI), If you are getting Rollback Error then it may be occurring due to your network is connected with your Client Network or your Company Network where you are working on.

So Please try to install CLI in your public network (or Your Mobile's hotspot Network) then you would definitely get CLI installed.

blocks|key|2767344|text|解决方案：npm的‘proxy’和‘https-proxy’键的默认值为NULL。在进行了更多的研发之后，我尝试将代理设置值设置为上面的键(此解决方案在我的场景中有效)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2767345|同样的代理设置也需要应用在IE浏览器>>设置>>局域网设置中。|2767346|结论：在公司/某些环境中，代理是一个强制设置，否则npm安装将无法工作。|2767347|GitHub：https://github.com/SharePoint/sp-dev-docs/issues/3266杂志|2767348|您可以参考博客获得详细信息https://blogs2share.blogspot.com/2019/01/spfx-environment-setup-error.html。|2767349|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/SharePoint/sp-dev-docs/issues/3266|1|https://blogs2share.blogspot.com/2019/01/spfx-environment-setup-error.html^0|0|4|0|0|0|2|0|7|1H|0|0|D|22|1|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|10|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|14|8|@]|D|@$9|15|A|16|1|17]]|E|$]]|$1|L|3|M|5|6|7|18|8|@]|D|@$9|19|A|1A|1|1B]]|E|$]]|$1|N|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]]|O|$P|$5|Q|R|S|E|$T|U]]|V|$5|Q|R|S|E|$T|W]]]]

Solution:
The default value of ‘proxy’ and ‘https-proxy’ key of npm config is NULL. After doing some more R &amp; D then I tried to set the proxy setting value to above key (this solution works in my scenario).

Also, the same proxy settings need to be applied in IE browser Internet Settings >> Settings >> LAN settings.

Conclusion:
In corporate/some environment the proxy is a somewhat mandatory setting otherwise npm install will not work.

Issue on GitHub: <a href="https://github.com/SharePoint/sp-dev-docs/issues/3266" rel="nofollow noreferrer">https://github.com/SharePoint/sp-dev-docs/issues/3266</a>

You can refer blog for detailed information 
<a href="https://blogs2share.blogspot.com/2019/01/spfx-environment-setup-error.html" rel="nofollow noreferrer">https://blogs2share.blogspot.com/2019/01/spfx-environment-setup-error.html</a>

blocks|key|2767401|text|您可以通过查看您的网络是否有代理来解决这个问题，即禁止下载过程。我公司的网络启用了防火墙，这给我造成了问题。因此，我不得不切换到一个不安全的网络(可能是你的移动网络的热点)，这对我来说是有效的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2767402|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You can resolve the issue by looking if your network has any proxies, that is prohibiting the download process. My company's network had a firewall enabled, which was causing the issue for me. So I had to switch to an un-secure network (probably a hotspot from your mobile network), and that worked for me.

blocks|key|2806238|text|我的是McAfee防火墙。它被设置为询问模式，所以应该弹出一个提示请求互联网连接，但它没有！进入McAfee和(暂时的！)禁用防火墙允许我安装。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2806239|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Mine was due to McAfee firewall.
It is set to Ask mode, so should have popped up a prompt to ask for internet connection, but it didn't!
Going into McAfee and (temporarily!) disabling the firewall allowed me to install.

blocks|key|1475117|text|我已经像上面描述的那样设置了代理程序，直到今天它才开始工作。结果，我现在需要“代理地址前面的http://”："http://{proxyURL}:{proxyPort}"，然后它终于起作用了。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1475118|entityMap|0|LINK|mutability|MUTABLE|url|http://{proxyURL}:{proxyPort}^0|1K|U|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I've already had the proxies set as described above and it was working until today. Then it turned out that now I need "http://" in front of my proxy address: "http://{proxyURL}:{proxyPort}". Then it finally worked.

blocks|key|2806407|text|在解决这一问题之前，他为此做了一段时间的斗争。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2806408|我用的是高塞拉(10.13.6)|2806409|多次卸载和重新安装节点和nvm+--使用installer.pkg、HomeBrew，然后使用命令行。海事组织，命令行运行得最好。|offset|length|style|CODE|2806410|我遵循了以下步骤：|2806411|Ran+npm+config+ls+-l|ordered-list-item|2806412|检查globalconfig的值是$<installpath>/.nvm/versions/node/v12.16.3/etc/npmrc，但是当我试图到达终端的这条路径时，它给了我No+such+file+or+directory
所以我|2806413|创建文件夹etc，创建npmrc文件并在其中添加此行。|2806414|registry+=+"https://registry.npmjs.org/"|code-block|syntax|javascript|2806415|我的~/.npmrc+$HOME中没有文件|BOLD|2806416|然后|2806417|我重新运行了npm+install命令。|2806418|请注意，这仍然抛出了rollbackFailedOptional:+verb+npm-session错误，但是这次完成了，尽管有不同的错误。您可以尝试这些步骤，看看它是否有效。|2806419|对于那些好奇的人，它抛出了一个Response+timeout+while+trying+to+fetch+https://registry.npmjs.org/<package>+(over+30000ms)错误，所以我将timeout+=+"60000"添加到/etc/npmrc文件中(就像在另一个Stackoverflow线程上发现的那样)，然后再试一次。这对我有用。|2806420|希望这能有所帮助！|2806421|entityMap^0|0|0|K|D|Y|8|0|0|4|G|0|2|C|H|1G|2J|P|0|5|3|B|5|0|0|2|8|B|5|J|2|2|8|B|5|0|0|2|0|0|K|6|B|0|0|2G|A|14|0|0|58|F|2I|34|H|3O|A|0|0|9|0^^$0|@$1|2|3|4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1D|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1E|8|@$F|1F|G|1G|H|I]|$F|1H|G|1I|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|1J|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|1K|8|@$F|1L|G|1M|H|I]]|9|@]|A|$]]|$1|O|3|P|5|N|7|1N|8|@$F|1O|G|1P|H|I]|$F|1Q|G|1R|H|I]|$F|1S|G|1T|H|I]]|9|@]|A|$]]|$1|Q|3|R|5|N|7|1U|8|@$F|1V|G|1W|H|I]|$F|1X|G|1Y|H|I]]|9|@]|A|$]]|$1|S|3|T|5|U|7|1Z|8|@]|9|@]|A|$V|W]]|$1|X|3|Y|5|6|7|20|8|@$F|21|G|22|H|Z]|$F|23|G|24|H|Z]|$F|25|G|26|H|Z]|$F|27|G|28|H|I]|$F|29|G|2A|H|I]]|9|@]|A|$]]|$1|10|3|11|5|6|7|2B|8|@$F|2C|G|2D|H|Z]]|9|@]|A|$]]|$1|12|3|13|5|N|7|2E|8|@$F|2F|G|2G|H|Z]|$F|2H|G|2I|H|I]]|9|@]|A|$]]|$1|14|3|15|5|6|7|2J|8|@$F|2K|G|2L|H|Z]|$F|2M|G|2N|H|I]]|9|@]|A|$]]|$1|16|3|17|5|6|7|2O|8|@$F|2P|G|2Q|H|Z]|$F|2R|G|2S|H|I]|$F|2T|G|2U|H|I]|$F|2V|G|2W|H|I]]|9|@]|A|$]]|$1|18|3|19|5|6|7|2X|8|@$F|2Y|G|2Z|H|Z]]|9|@]|A|$]]|$1|1A|3|-4|5|6|7|30|8|@]|9|@]|A|$]]]|1B|$]]

Struggled with this issue for some time before figuring it out. 
I'm using High Sierra (10.13.6)
 
Uninstalled and re-installed node and nvm multiple times - using the <code>installer.pkg</code>, <code>HomeBrew</code>, and then using the command line. IMO, the command line works the best.
 
I followed these steps: 
1. Ran <code>npm config ls -l</code> 
2. Checked that the value for <code>globalconfig</code> was <code>$&lt;installpath&gt;/.nvm/versions/node/v12.16.3/etc/npmrc</code> But when I tried to get to this path in the Terminal, it gave me <code>No such file or directory</code> 
So I 
3. created the folder <code>etc</code>, created the <code>npmrc</code> file and added this line in it. 

<pre><code>registry = "https://registry.npmjs.org/"
</code></pre>

 I do not have the <code>~/.npmrc</code> file in my <code>$HOME</code> 
Then 
4. I re-ran the <code>npm install</code> command.

 
Note that this still threw the <code>rollbackFailedOptional: verb npm-session</code> error, but this time it completed, though with a different error.
You could try these steps and see if it works.

For those who are curious, it threw a <code>Response timeout while trying to fetch https://registry.npmjs.org/&lt;package&gt; (over 30000ms)</code> error, so I added the <code>timeout = "60000"</code> to the <code>/etc/npmrc</code> file (as found on another Stackoverflow thread), and tried again. This worked for me.
 

Hope this helps!

blocks|key|2806477|text|尝试这里回答的所有命令来解决问题，如果问题仍然存在，请执行以下步骤|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2806478|完全卸载nodejs签出此答案以完成nodejs+https://stackoverflow.com/a/20711410/12142401的卸载
从他们的网站下载更新的nodejs安装程序，将其安装在任何驱动器中，而不是安装在以前安装的驱动器上，就像您安装在C驱动器中，然后安装在D，S，G驱动器中，运行npm命令，它将完全正常工作。|blockquote|offset|length|2806479|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/20711410/12142401^0|0|P|19|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@$E|Q|F|R|1|S]]|A|$]]|$1|G|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|H|$I|$5|J|K|L|A|$M|N]]]]

Try this all command answered here to solve the problem <a href="https://stackoverflow.com/a/54173142/12142401">https://stackoverflow.com/a/54173142/12142401</a>
if problem persists 
Do the following Steps

<blockquote>
 Completely Uninstall the nodejs checkout this answer for complete uninstallation of nodejs <a href="https://stackoverflow.com/a/20711410/12142401">https://stackoverflow.com/a/20711410/12142401</a>
 
 Download the updated nodejs setup from their website
 Install it in any drive but not on previously installed drive like if you installed in C drive then install in D,S,G Drive 
 Run your npm command it will completely work fine
</blockquote>

blocks|key|1475198|text|如果你像我一样使用vpm，试着关掉它一会儿，至少这是我的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1475199|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you use vpm as I do, try turn it off a sec, at least that's my problem

blocks|key|1475261|text|我也有同样的问题。我删除了Mac+"/usr/local/bin/npm“、"/usr/local/bin/node”和已删除文件夹“/usr/local/lib/node”中的文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1475262|然后安装当前最新的节点功能版本。然后问题解决了。|1475263|下载LTS版本时，也会出现同样的问题。因此，尝试安装不同版本的节点并删除旧节点。|1475264|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I had same problem.
I deleted files in my Mac
&quot;/usr/local/bin/npm&quot;, &quot;/usr/local/bin/node&quot;
and deleted folder
&quot;/usr/local/lib/node_modules&quot;
and then installed the current latest feature version of node. then problem solved.
When downloaded LTS version, it shows the same problem.
So, try installing different versions of node and deleting old one.

blocks|key|2767756|text|Hi，|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2767757|适用于使用纱线包装的人。只需转到有此问题的项目文件夹即可。假设项目的文件夹名为chatApp：|2767758|cd+chatApp|code-block|syntax|javascript|2767759|然后，如果您已经安装了纱线或纱线，然后删除node_modules文件夹并运行以下命令，或者如果您还没有安装纱线，则只运行blow命令：|2767760|yarn+cache+clean|2767761|一旦纱线成功地清除了缓存，请运行以下命令：|2767762|yarn+config+set+registry+https://registry.npmjs.org/|2767763|仅此而已，这应该可以解决✔️的问题。|2767764|entityMap^0|0|3|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|11|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|12|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|13|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|14|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|15|8|@]|D|@]|E|$]]|$1|S|3|T|5|J|7|16|8|@]|D|@]|E|$K|L]]|$1|U|3|V|5|6|7|17|8|@]|D|@]|E|$]]|$1|W|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|X|$]]

Hi,
For people that use yarn package. Just go to the project folder that you are having this issue with. Let's say the project's folder name is chatApp:
<pre><code>cd chatApp
</code></pre>
And then if you have already done yarn or yarn install then delete the node_modules folder and run the below command or if you haven't done yarn install, only run the blow command:
<pre><code>yarn cache clean
</code></pre>
Once yarn has successfully cleaned the cache, run the below command:
<pre><code>yarn config set registry https://registry.npmjs.org/
</code></pre>
That's it, this should fix the issue ✔️.

blocks|key|1474558|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1474559|删除文件夹中的所有文件：%25APPDATA%25\\_lock|1474560|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

try this:

delete all file in folder: %APPDATA%\npm-cache\_locks

blocks|key|1474644|text|对于Windows:再次运行安装程序并选择“修复”安装|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1474645|为我工作|1474646|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

For Windows:
Run the installer again and choose to 'Repair' the installation

Worked for me

blocks|key|1475077|text|试试这个。对我来说很好，|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1475078|npm安装/your_floder_location+package_name+-注册表http://registry.npmjs.org/|blockquote|1475079|下面是我在laravel项目中安装vue路由器包的确切命令(我的项目名为vue_laravel)。|1475080|/var/www/html/projects/vue_laravel+vue-路由器-注册表http://registry.npmjs.org/|1475081|祝好运|1475082|entityMap|0|LINK|mutability|MUTABLE|url|http://registry.npmjs.org/|1^0|0|C|0|R|C|18|Q|0|0|0|0|Y|Z|7|1A|Q|1|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|10|8|@$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]]|E|$]]|$1|I|3|J|5|6|7|16|8|@]|D|@]|E|$]]|$1|K|3|L|5|H|7|17|8|@$9|18|A|19|B|C]|$9|1A|A|1B|B|C]]|D|@$9|1C|A|1D|1|1E]]|E|$]]|$1|M|3|N|5|6|7|1F|8|@]|D|@]|E|$]]|$1|O|3|-4|5|6|7|1G|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]|W|$5|R|S|T|E|$U|V]]]]

Try this. It worked fine for me 

<blockquote>
 npm install /your_floder_location package_name --registry
 <a href="http://registry.npmjs.org/" rel="nofollow noreferrer">http://registry.npmjs.org/</a>
</blockquote>

Below is the exact command for me for installing vue-router package in my laravel project (my project name vue_laravel)

<blockquote>
 aslam004:vue_laravel $ npm install
 /var/www/html/projects/vue_laravel vue-router --registry <a href="http://registry.npmjs.org/" rel="nofollow noreferrer">http://registry.npmjs.org/</a>
</blockquote>

Good luck

blocks|key|2805862|text|在命令之前使用sudo作为|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2805863|sudo+npm安装|2805864|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

use sudo before your command as

<hr>

sudo npm install

When I try <code>npm install</code> new packages it shows me this error:

<blockquote>
 rollbackFailedOptional: verb npm-session 585aaecfe5f9a82
</blockquote>

<pre><code>node --version
8.4.0

npm --version
5.3.0
</code></pre>

npm install Error: rollbackFailedOptional

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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当我尝试npm install新包时，它会显示以下错误：rollbackFailedOptional:动词npm-会话585 aecfe5f9a82node --version8.4.0npm --version5.3.0

问npm安装错误: rollbackFailedOptional
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