nodejs development environment configuration and use_node.js

Let’s talk about nodejs first. Some people think it is a language, but it is not. It is a platform, a js running platform built on Google’s V8 engine. It parses js and provides some of its own APIs. User calls. Judging from the current situation, this development is pretty good. There will be many front-end and back-end engineers joining tomorrow. Even some experts are paying attention and even writing blogs. Last night I saw an article written by a foreign website. I have developed nearly 90 nodejs web plug-ins. This is really awesome! So what are the most direct benefits for us to learn from China Dongdong: Since the front-end personnel are familiar with js, they can basically learn Linux and get started. It is a little more troublesome for the back-end engineers, because some back-end engineers are not very good at it. If you are familiar with js, there may be many obstacles in using it. Here I suggest you learn basic js. After talking about this, I think what everyone is concerned about is the salary issue. So far, basically nodejs engineers with more than one year have been offered in Guangzhou. It’s over 7K. A former colleague mentioned this about his company’s recruitment situation, and I found out that this thing is almost as good as hadoop! Enough nonsense, let’s talk about this topic: environment configuration (since I developed under windows 8.1, I will only talk about windows here).

Install nodejs

First go to the nodejs official website http://www.nodejs.org/download/ to download the corresponding version. Mine is 64-bit. Install directly after downloading. Since the current version has reached v0.10.33, node and npm have been installed together, and even the environment variables have been set. After installation, you can see the following in the corresponding folder

After installation, you can use Shift to right-click in the currently installed folder to open cmd and enter the following to view the installed version. Mine is 0.10.32.

node-v

2. Global folder settings

As for node_cache and node_global, beginners should not need to set them, because they will be set in the current user directory, but sometimes they will be set for convenience. The setting commands provided here are as follows:

npmconfigls//列出prefix配置<br>npmconfigsetcache'D:\ProgramFiles\nodejs\node_cache'//设置全局缓存文件夹<br>npmconfigsetcache'node_global'//设置全局模块文件夹

3. Install the module

Now we have installed node and npm. As the name suggests, npm is the package manager of node. It is managed through commands. Let’s try it now:

Let’s install express, a web framework. The parameter -g represents installation in the global folder, if not, it represents the current folder

npminstallexpress-g//express还可以带上@版本号

Let’s check in the folder we just set to see if there are any more files. Here we use the command to check the version number of express that we just installed

express-V

If there is an output version, it means the installation is successful!

If we want to uninstall this plug-in, we can use the following command

npmuninstallexpress

After uninstalling it like this, we can install it back to express, but with the version number 3.2.2 (because this is the version I am most familiar with). Is this possible?

4. Use express to install

Now we use the command to create a web site, as follows:

expressTest

This will output some prompts. You can jump directly into the Test folder and run the site using the command:

nodeapp.js

Did you see the prompt? The port 3000 indicates that the startup was successful, but our browser reported an error when browsing. What is the prompt?

500 Error: Cannot find module 'jade'

Then there is an error message, so let’s install this module now. Here, there is a package.json file in this folder. This file describes some site information. We can use nodepad to open it. Take a look:

This shows that two libraries are needed, one is express and the other is jade, so let’s install it now. If you install many modules, you will need to execute many commands. Here is a relatively simple command, which will check the current Install the dependent libraries of package.json:

npminstall

After installing this module, we also need to modify the doctype 5 in the first line of the layout.jade file under views to doctype html. Then re-execute node app.js and our website can run normally.

5. Install supervisor plug-in

刚才我们可能都发现了，如果出了问题，nodejs自动停止了服务，这样很不利于调试啊，那我们有一个插件可以解决。这个插件是管理nodejs的进程，包括调试那些都非常好用。使用如下命令安装全局的模块：

npminstallsupervisor-g

这样我们就不用node命令来启动服务，直接使用supervisor app.js来就可以了。

六、 使用webStorm IDE

刚 才我们编辑js文件是使用nodepad来的，但这个不是很好，有好的编辑器吗，答案是有的，一个大名顶顶的webStorm，网上很多那个版本的下载， 大家懂得了，这里也提供一份网友给的链接http://yunpan.cn/cAcf6hVxnIbCt 提取码 246f，下载完直接安装，安装完覆盖一个exe文件就可以了，屌丝这样简单吧！

第一次运行是会打开一个文件夹，其实就是项目的文件夹。

下面来说下调试的问题，包括我也搞了好久网上也找了好久，最后在波哥说下才搞定，这个其实很难简单的，直接看图了：

如何在程序里打断点就可以进行调试了，很方便。

以上就是个人对于nodejs开发环境配置与使用的经验的全部记录了，后续再继续分享一些nodejs的详细应用。