blocks|key|4653014|text|下载的代码可能要求您先安装依赖项。尝试命令(在app.js目录中)：npm+install，然后是node+app.js。这应该会安装依赖项，然后启动应用程序。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4653015|entityMap^0|Y|B|1D|B|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

The code downloaded may require you to install dependencies first. Try commands(in app.js directory): <code>npm install</code> then <code>node app.js</code>. This should install dependencies and then start the app.

blocks|key|4653085|text|要运行app.js文件，请检查package.json文件中的"main":+"app.js"。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4653086|然后运行应该运行您的应用程序的命令$+node+app.js并进行检查。|4653087|entityMap^0|V|G|0|H|D|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

To run app.js file check <code>"main": "app.js"</code> in your package.json file.

Then run command <code>$ node app.js</code> That should run your app and check.

blocks|key|4653051|text|Node正在抱怨，因为没有名为define的函数，您的代码尝试在其第一行调用该函数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4653052|define来自于标准节点开发中不使用的AMD。|4653053|有可能是你的项目的开发者使用了某种trickery在node中使用了AMD。您应该询问此人运行代码需要哪些特殊步骤。|4653054|entityMap|0|LINK|mutability|MUTABLE|url|http://requirejs.org/|1|http://requirejs.org/docs/node.html^0|F|6|0|0|6|K|3|0|0|H|8|1|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|H|3|I|5|6|7|12|8|@]|D|@$9|13|A|14|1|15]]|E|$]]|$1|J|3|-4|5|6|7|16|8|@]|D|@]|E|$]]]|K|$L|$5|M|N|O|E|$P|Q]]|R|$5|M|N|O|E|$P|S]]]]

Node is complaining because there is no function called <code>define</code>, which your code tries to call on its very first line.

<code>define</code> comes from <a href="http://requirejs.org/" rel="nofollow">AMD</a>, which is not used in standard node development.

It is possible that the developer you got your project from used some kind of <a href="http://requirejs.org/docs/node.html" rel="nofollow">trickery</a> to use AMD in node. You should ask this person what special steps are necessary to run the code.

blocks|key|146553|text|您有一个显示项目主要配置的package.json文件，以及一个包含项目配置的完整详细信息的锁定文件，例如，在项目的根文件夹中保存项目中使用的每个包或库的urls+......|type|unstyled|depth|inlineStyleRanges|entityRanges|data|146554|npm是Node.js的默认包管理器...您所需要做的就是从根目录中的终端调用$+npm+install，其中包含package.json和锁定文件...since，您不需要添加要安装的任何特定软件包。它将通过锁文件，并下载一个接一个，从他们的urls写在锁文件中所需的包，如果它不存在于项目环境中。|offset|length|style|CODE|146555|请确保编辑您的package.json文件...为你的应用程序提供一个入口点....."name":"app.js"，其中app.js是主脚本..或index.js，这取决于项目的命名约定...|146556|然后，您可以运行..$+Node+app.js或$+npm+start，如果您的package.json脚本具有类似"scripts":+{+"start":+"Node+index.js",+"test":+"test"+}的起始字段配置.....它仍然间接地调用您的$+Node+app.js|146557|entityMap^0|0|13|D|0|17|F|0|A|D|O|B|1M|1J|3R|D|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@$D|P|E|Q|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@$D|S|E|T|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|U|8|@$D|V|E|W|F|G]|$D|X|E|Y|F|G]|$D|Z|E|10|F|G]|$D|11|E|12|F|G]]|9|@]|A|$]]|$1|L|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|M|$]]

you have a package.json file that shows the main configuration of your project,
and a lockfile that contains the full details of your project configuration such as the urls that holds each of the package or libraries used in your project at the root folder of the project......
npm is the default package manager for Node.js....
All you need to do is call <code>$ npm install</code> from the terminal in the root directory where you have the package.json and lock file ...since you are not adding any particular package to be install ..... it will go through the lock file and download one after the other, the required packages from their urls written in the lock file if it isnt present in the project enviroment .....
you make sure you edit your package.json file .... to give an entry point to your app..... <code>&quot;name&quot;:&quot;app.js&quot;</code> where app.js is the main script .. or index.js depending on the project naming convention...
then you can run..<code>$ Node app.js</code> or <code>$ npm start</code> if your package.json scripts has a start field config as such <code>&quot;scripts&quot;: { &quot;start&quot;: &quot;Node index.js&quot;, &quot;test&quot;: &quot;test&quot; }</code>..... which is indirectly still calling your <code>$ Node app.js</code>

blocks|key|146589|text|如果Node+Js项目：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|146590|+++++++++++Normally+we+can+run,
+++++++++++>node+app+

++++++++++++++(or)+

+++++++++++Install+nodemon+dependency+(npm+i+-g+nodemon)
+++++++++++>nodemon+app.js

++++++++++++++(or)

+++++++++++In+Package.json,+inside+the+scripts+has+"start":"nodemon+app.js"
+++++++++++>npm+start|code-block|syntax|javascript|146591|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|$]]

If the Node Js Project :
<pre><code> Normally we can run,
 &gt;node app 

 (or) 

 Install nodemon dependency (npm i -g nodemon)
 &gt;nodemon app.js

 (or)

 In Package.json, inside the scripts has &quot;start&quot;:&quot;nodemon app.js&quot;
 &gt;npm start
</code></pre>

blocks|key|4653362|text|要运行node+js项目，可以使用以下命令运行该项目|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4653363|node+app.js++|code-block|syntax|javascript|4653364|但是，如果要使用npm+start运行项目，则需要在package.json文件的脚本中传递"start":+"Node+app.js"|offset|length|style|CODE|4653365|因此，您的package.json文件将如下所示|4653366|"scripts":+{+"start":+"node+app.js",+"test":+"test"+}|4653367|完成更改后，您只需保存文件，然后转到终端，点击npm+start命令，您将看到项目在使用node+app.js命令时启动了|4653368|有关说明，请参阅下图|4653369|​|4653370|📷|atomic|4653371|4653372|您还可以在下图中看到，您的项目同时在命令node+app.js和npm+start上运行|4653373|4653374|4653375|4653376|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/1f2be4d1702cd96ef19d3b6c44ce1ecc.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/239495a0339f0f71b6e34d86bb6d6e6a.png^0|0|0|8|9|1A|M|0|0|0|N|9|18|B|0|0|0|0|1|0|0|0|K|B|W|9|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|1G|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1H|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1I|8|@$I|1J|J|1K|K|L]|$I|1L|J|1M|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|1N|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|1O|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|1P|8|@$I|1Q|J|1R|K|L]|$I|1S|J|1T|K|L]]|9|@]|A|$]]|$1|S|3|T|5|6|7|1U|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|1V|8|@]|9|@]|A|$]]|$1|W|3|X|5|Y|7|1W|8|@]|9|@$I|1X|J|1Y|1|1Z]]|A|$]]|$1|Z|3|V|5|6|7|20|8|@]|9|@]|A|$]]|$1|10|3|11|5|6|7|21|8|@$I|22|J|23|K|L]|$I|24|J|25|K|L]]|9|@]|A|$]]|$1|12|3|V|5|6|7|26|8|@]|9|@]|A|$]]|$1|13|3|X|5|Y|7|27|8|@]|9|@$I|28|J|29|1|2A]]|A|$]]|$1|14|3|V|5|6|7|2B|8|@]|9|@]|A|$]]|$1|15|3|-4|5|6|7|2C|8|@]|9|@]|A|$]]]|16|$17|$5|18|19|1A|A|$1B|1C|1D|-4]]|1E|$5|18|19|1A|A|$1B|1F|1D|-4]]]]

To run a node js project you can run the project by below commands
<pre><code>node app.js 
</code></pre>
But if you want to run your project with <code>npm start</code> then you need to pass <code>&quot;start&quot;: &quot;Node app.js&quot;</code> in the scripts of the package.json file
So, your package.json file will look like below
<pre><code>&quot;scripts&quot;: { &quot;start&quot;: &quot;node app.js&quot;, &quot;test&quot;: &quot;test&quot; }
</code></pre>
Once you are done with the changes then you just need to save the file and then go to the terminal hit the <code>npm start</code> command you will see that the project started as its working on the <code>node app.js</code> command
Refer to below image for clarification
<a href="https://i.stack.imgur.com/2Z37c.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2Z37c.png" alt="enter image description here" /></a>
You can also see in the below image that your project runs on both command <code>node app.js</code> as well as <code>npm start</code>
<a href="https://i.stack.imgur.com/IUfzh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IUfzh.png" alt="enter image description here" /></a>

blocks|key|146493|text|Node管理依赖项，即使用package.json的第三方代码，因此第三方模块的名称和版本可以在项目的所有安装中保持稳定。这也有助于保持文件的轻量级，因为在代码存储库中只存在实际的程序代码。无论何时克隆存储库，为了使其正常工作(因为代码中可能会使用第三方模块)，您需要安装所有依赖项。在项目结构的根目录中使用npm+install+on+CMD来完成所有依赖项的安装。如果正确安装了依赖项，这应该可以解决所有依赖项问题。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|146494|entityMap^0|4A|B|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Node manages dependencies ie; third party code using package.json so that 3rd party modules names and versions can be kept stable for all installs of the project. This also helps keep the file be light-weight as only actual program code is present in the code repository. Whenever repository is cloned, for it to work(as 3rd party modules may be used in the code), you would need to install all dependencies. 
Use <code>npm install</code> on CMD within root of the project structure to complete installing all dependencies. This should resolve all dependencies issues if dependencies get properly installed.

blocks|key|146500|text|const+express+=+require('express')
const+app+=+express()
const+port+=+3000

app.get('/',+(req,+res)+=>+res.send('Hello+World!'))

app.listen(port,+()+=>+console.log(`Example+app+listening+on+port+${port}!`))|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|146501|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>const express = require('express')
const app = express()
const port = 3000

app.get('/', (req, res) =&gt; res.send('Hello World!'))

app.listen(port, () =&gt; console.log(`Example app listening on port ${port}!`))
</code></pre>

I am very new to <code>Node.js</code> and I tried to run a project (made by other developer) by having a command in terminal <code>node app.js</code>. But I encountered below error, do you have any idea how to run this project?

I followed few instructions <a href="https://stackoverflow.com/questions/8778604/how-do-i-run-a-index-jade-file">here</a> to run a project.

Error logs below:

<pre><code>Junryls-Mac-mini:app junrylmaraviles$ node app.js

/Users/junrylmaraviles/Desktop/myfolder/mysubfolder/app/app.js:1
(function (exports, require, module, __filename, __dirname) { define('src/app'
 ^
ReferenceError: define is not defined
 at Object.&lt;anonymous&gt; (/Users/junrylmaraviles/Desktop/myfolder/mysubfolder/app/app.js:1:63)
 at Module._compile (module.js:456:26)
 at Object.Module._extensions..js (module.js:474:10)
 at Module.load (module.js:356:32)
 at Function.Module._load (module.js:312:12)
 at Function.Module.runMain (module.js:497:10)
 at startup (node.js:119:16)
 at node.js:902:3
</code></pre>

Node - how to run app.js?

包管理器

我对Node.js非常陌生，我试图通过在终端node app.js中使用一个命令来运行一个项目(由其他开发人员开发)。但是我遇到了下面的错误，你知道如何运行这个项目吗？我按照的一些说明来运行一个项目。错误日志如下：Junryls-Mac-mini:app junrylmaraviles$ node app.js/Users/junrylmaraviles/Desktop/myfolder/mysu

问Node -如何运行app.js？
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