blocks|key|225904|text|打开终端窗口。类型：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|225905|node+-v|code-block|syntax|javascript|225906|这将显示您的nodejs版本。|offset|length|style|CODE|225907|导航到保存脚本和输入的位置：|225908|node+script.js|225909|这将运行您的脚本。|225910|entityMap^0|0|0|6|6|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@$I|X|J|Y|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|10|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

Open a terminal window.
Type:

<pre><code>node -v
</code></pre>

This will display your <code>nodejs</code> version.

Navigate to where you saved your script and input:

<pre><code>node script.js
</code></pre>

This will run your script.

blocks|key|231118|text|打开终端并输入|type|unstyled|depth|inlineStyleRanges|entityRanges|data|231119|node+-v|code-block|syntax|javascript|231120|这将告诉您安装的nodejs的版本，然后通过输入以下命令运行nodejs+simple|231121|node|231122|提示必须是更改。输入以下内容，|231123|function+testNode()+{return+"Node+is+working"};+testNode();|231124|如果安装成功，命令行必须提示以下输出|231125|'Node+is+working'|231126|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

open a terminal and enter

<pre><code>node -v
</code></pre>

this will tell you the version of the nodejs installed, then run nodejs simple by entering

<pre><code>node
</code></pre>

Prompt must be change. Enter following,

<pre><code>function testNode() {return "Node is working"}; testNode();
</code></pre>

command line must prompt the following output if the installation was successful

<pre><code>'Node is working'
</code></pre>

blocks|key|3099496|text|请尝试这个命令node+--或node+-v，这两个命令都应该返回类似v4.4.5的内容。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|3099497|entityMap^0|7|7|F|7|Z|6|0^^$0|@$1|2|3|4|5|6|7|I|8|@$9|J|A|K|B|C]|$9|L|A|M|B|C]|$9|N|A|O|B|D]]|E|@]|F|$]]|$1|G|3|-4|5|6|7|P|8|@]|E|@]|F|$]]]|H|$]]

Please try this command node --version or node -v, either of which should return something like <code>v4.4.5</code>.

blocks|key|3099574|text|通过在终端中键入命令来检查节点版本|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3099575|node+-v|code-block|syntax|javascript|3099576|输入以下命令检查npm版本|3099577|npm+-v|3099578|如果这些命令为您提供了node和npm的版本号，那么您就可以进行NodeJs开发了|offset|length|style|CODE|3099579|3099580|测试节点的时间|BOLD|3099581|通过运行命令创建目录。|3099582|mkdir+NodeJs|3099583|将目录更改为NodeJs文件夹并创建一个文件|3099584|touch+index.js|3099585|使用vi或在您喜欢的文本编辑器中打开index.js。|3099586|键入|3099587|console.log('Welcome+to+NodesJs.')+|3099588|并保存该文件。|3099589|导航回终端中保存的文件，然后键入|3099590|node+index.js|3099591|如果你看到Welcome+to+NodesJs.，你就做得很好，你就是NodeJs了。|3099592|entityMap^0|0|0|0|0|B|4|G|3|W|6|0|0|5|2|0|0|B|0|0|0|M|6|6|0|0|0|R|2|2|I|8|0|0|2|0|0|0|7|0|0|G|0|0|0|17|5|J|0^^$0|@$1|2|3|4|5|6|7|1I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1J|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1K|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|1L|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|1M|8|@$M|1N|N|1O|O|P]|$M|1P|N|1Q|O|P]|$M|1R|N|1S|O|P]]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1T|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1U|8|@$M|1V|N|1W|O|T]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1X|8|@$M|1Y|N|1Z|O|T]]|9|@]|A|$]]|$1|W|3|X|5|D|7|20|8|@]|9|@]|A|$E|F]]|$1|Y|3|Z|5|6|7|21|8|@$M|22|N|23|O|T]|$M|24|N|25|O|P]]|9|@]|A|$]]|$1|10|3|11|5|D|7|26|8|@]|9|@]|A|$E|F]]|$1|12|3|13|5|6|7|27|8|@$M|28|N|29|O|T]|$M|2A|N|2B|O|P]|$M|2C|N|2D|O|P]]|9|@]|A|$]]|$1|14|3|15|5|6|7|2E|8|@$M|2F|N|2G|O|T]]|9|@]|A|$]]|$1|16|3|17|5|D|7|2H|8|@]|9|@]|A|$E|F]]|$1|18|3|19|5|6|7|2I|8|@$M|2J|N|2K|O|T]]|9|@]|A|$]]|$1|1A|3|1B|5|6|7|2L|8|@$M|2M|N|2N|O|T]]|9|@]|A|$]]|$1|1C|3|1D|5|D|7|2O|8|@]|9|@]|A|$E|F]]|$1|1E|3|1F|5|6|7|2P|8|@$M|2Q|N|2R|O|T]|$M|2S|N|2T|O|P]]|9|@]|A|$]]|$1|1G|3|-4|5|6|7|2U|8|@]|9|@]|A|$]]]|1H|$]]

Check the node version by typing in your terminal
<pre><code>node -v
</code></pre>
Check the npm version by typing
<pre><code>npm -v
</code></pre>
If these commands give you the version numbers for <code>node</code> and <code>npm</code> you are good to go with <code>NodeJs</code> development
<hr />
Time to test node
Create a Directory by running the command.
<pre><code>mkdir NodeJs
</code></pre>
Change your directory to the <code>NodeJs</code> folder and create a file
<pre><code>touch index.js
</code></pre>
Open your <code>index.js</code> either using <code>vi</code> or in your favorite text editor.
Type in
<pre><code>console.log('Welcome to NodesJs.') 
</code></pre>
and save the file.
Navigate back to your saved file in the terminal and type
<pre><code>node index.js
</code></pre>
If you see <code>Welcome to NodesJs.</code> you did a nice job and you are up with NodeJs.

blocks|key|229635|text|(这是针对windows操作系统的，但概念也可应用于其他操作系统)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|229636|运行命令node+-v将能够确认是否已安装，但无法确认是否已安装。(可执行文件可能不在您的路径中)|offset|length|style|CODE|229637|有两种方法可以检查它是否已实际安装：|229638|229639|检查默认安装位置C:\Program+Files\nodejs\|ordered-list-item|229640|229641|或|229642|然后转到System+Settings+->+Add+or+Remove+Programs++filter+by+node，它应该会显示您是否安装了它。对我来说，它显示为标题："Node.js“和描述”Node.js基础“，但没有指定版本。安装大小为52.6MB|229643|如果您还没有安装它，可以从这里获取https://nodejs.org/en/download/|229644|entityMap|0|LINK|mutability|MUTABLE|url|https://nodejs.org/en/download/^0|0|4|7|0|0|0|8|O|0|0|0|4|15|1L|4|0|H|V|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|13|8|@$D|14|E|15|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|16|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|17|8|@]|9|@]|A|$]]|$1|K|3|L|5|M|7|18|8|@$D|19|E|1A|F|G]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1C|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1D|8|@$D|1E|E|1F|F|G]|$D|1G|E|1H|F|G]]|9|@]|A|$]]|$1|S|3|T|5|6|7|1I|8|@]|9|@$D|1J|E|1K|1|1L]]|A|$]]|$1|U|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]]]

(This is for windows OS but concept can be applied to other OS)

Running command <code>node -v</code> will be able to confirm if it is installed, however it will not be able to confirm if it is NOT installed. (Executable may not be on your PATH)

Two ways you can check if it is actually installed:

<ol>
<li>Check default install location <code>C:\Program Files\nodejs\</code></li>
</ol>

or 

<ol start="2">
<li>Go to <code>System Settings -&gt; Add or Remove Programs</code> and filter by <code>node</code>, it should show you if you have it installed. For me, it shows as title:"Node.js" and description "Node.js Foundation", with no version specified. Install size is 52.6MB</li>
</ol>

If you don't have it installed, get it from here <a href="https://nodejs.org/en/download/" rel="noreferrer">https://nodejs.org/en/download/</a>

blocks|key|3099649|text|在Windows中打开命令提示符，或者在Linux和Mac.Type中打开终端|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3099650|node+-v|code-block|syntax|javascript|3099651|如果安装了节点，它将显示其version.For，|3099652|v6.9.5|3099653|否则请从nodejs.org下载|offset|length|3099654|entityMap|0|LINK|mutability|MUTABLE|url|https://nodejs.org/en/^0|0|0|0|0|4|A|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|10|8|@]|9|@$M|11|N|12|1|13]]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

Open the command prompt in Windows or terminal in Linux and Mac.Type

<pre><code>node -v
</code></pre>

If node is install it will show its version.For eg.,

<pre><code>v6.9.5
</code></pre>

Else download it from <a href="https://nodejs.org/en/" rel="nofollow noreferrer">nodejs.org</a>

I've recently installed node.js and I have no idea how to run applications. I installed node.js but couldn't find further instructions. What does one really need to do? I wanted to see if it was actually working. So I executed a script called hello.js. It went as such:

<pre><code>console.log('hello world');
</code></pre>

Now where would this be logged to? 

Edit

I'm running this .js through a .php script.

How to tell if node.js is installed or not

Windows

Linux

我最近安装了node.js，但我不知道如何运行应用程序。我安装了node.js，但找不到进一步的说明。人们真正需要做的是什么？我想看看它是否真的起作用了。因此，我执行了一个名为hello.js的脚本。事情是这样的：console.log('hello world');现在，这将被记录到哪里？编辑我正在通过一个.php脚本运行这个.js。

问如何判断node.js是否已安装
EN

回答 6

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