Node.js安装及环境配置
<h6>一、安装环境</h6><p>1、本机系统：Windows 10 Pro（64位）<br>2、Node.js：<img src="https://img2018.cnblogs.com/blog/1640046/201905/1640046-20190505132221703-1612108760.png"></p>
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<h6>二、安装Node.js步骤</h6>
<p>1、下载对应你系统的Node.js版本:https://nodejs.org/en/download/<br>2、选安装目录进行安装<br>3、环境配置<br>4、测试</p>
<h6>三、前期准备</h6>
<p>1、Node.js简介<br>简单的说 Node.js 就是运行在服务端的 JavaScript。Node.js 是一个基于 Chrome V8 引擎的 JavaScript 运行环境。Node.js 使用了一个事件驱动、非阻塞式 I/O 的模型，使其轻量又高效。Node.js 的包管理器 npm，是全球最大的开源库生态系统。<br>2、下载Node.js<br>打开官网下载链接:https://nodejs.org/en/download/ </p>
<h6>四、开始安装</h6>
<p>1、下载完成后，msi文件，开始安装Node.js</p>
<p><img src="https://img2018.cnblogs.com/blog/1640046/201905/1640046-20190505132356145-2118072027.png"></p>
<p>点击【Next】按钮</p>
<div class="image-package"><img src="https://upload-images.jianshu.io/upload_images/2267589-69648c7b8aa496fe.png?imageMogr2/auto-orient/strip%7CimageView2/2"></div>
<div class="image-package"> </div>
<div class="image-package">勾选复选框，点击【Next】按钮</div>
<div class="image-package">使用自己的安装路径</div>
<div class="image-package">我的：D:\nodejs</div>
<div class="image-package"> </div>
<div class="image-package">然后一路点下去，最后install</div>
<div class="image-package"> </div>
<div class="image-package">至此Node.js已经安装完成，可以先进行下简单的测试安装是否成功了，后面还要进行环境配置<br>在键盘按下【win+R】键，输入cmd，然后回车，打开cmd窗口<img src="https://img2018.cnblogs.com/blog/1640046/201905/1640046-20190505132609058-1192674289.png">
<p>安装完后的目录如下图所示：</p>
</div>
<div class="image-package"> <img src="https://img2018.cnblogs.com/blog/1640046/201905/1640046-20190505132709400-927377105.png">
<p>此处说明下：新版的Node.js已自带npm，安装Node.js时会一起安装，npm的作用就是对Node.js依赖的包进行管理，也可以理解为用来安装/卸载Node.js需要装的东西</p>
<p> </p>
<h6>五、环境配置</h6>
<p>【D:\nodejs】下创建两个文件夹【node_global】及【node_cache】如下图：</p>
<p><img src="https://img2018.cnblogs.com/blog/1640046/201905/1640046-20190505132801543-1430691022.png"></p>
<p>创建完两个空文件夹之后，打开cmd命令窗口，输入</p>
<p>npm config <span class="hljs-keyword">set prefix <span class="hljs-string"><span class="hljs-string">"D:<span class="hljs-subst"><span class="hljs-string">\nodejs<span class="hljs-subst"><span class="hljs-string">\node_global" </span></span></span></span></span></span></span></p>
<p><span class="hljs-keyword"><span class="hljs-string"><span class="hljs-string"><span class="hljs-subst"><span class="hljs-string"><span class="hljs-subst"><span class="hljs-string">npm config <span class="hljs-keyword">set <span class="hljs-keyword">cache <span class="hljs-string"><span class="hljs-string">"D:<span class="hljs-subst"><span class="hljs-string">\nodejs<span class="hljs-subst"><span class="hljs-string">\node_cache"</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></p>
<p> </p>
<p><span class="hljs-keyword"><span class="hljs-string"><span class="hljs-string"><span class="hljs-subst"><span class="hljs-string"><span class="hljs-subst"><span class="hljs-string"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-string"><span class="hljs-string"><span class="hljs-subst"><span class="hljs-string"><span class="hljs-subst"><span class="hljs-string">环境配置：</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></p>
<p><span class="hljs-keyword"><span class="hljs-string"><span class="hljs-string"><span class="hljs-subst"><span class="hljs-string"><span class="hljs-subst"><span class="hljs-string"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-string"><span class="hljs-string"><span class="hljs-subst"><span class="hljs-string"><span class="hljs-subst"><span class="hljs-string"><img src="https://img2018.cnblogs.com/blog/1640046/201905/1640046-20190505132951914-1739649506.png"></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></p>
<p><img src="https://img2018.cnblogs.com/blog/1640046/201905/1640046-20190505133016860-1981586220.png"></p>
<p><img src="https://img2018.cnblogs.com/blog/1640046/201905/1640046-20190505133025743-412430826.png"></p>
<p> </p>
<p> <img src="https://img2018.cnblogs.com/blog/1640046/201905/1640046-20190505133137087-1473188142.png"></p>
<p>点击确定</p>
<p> </p>
<h6>六、测试</h6>
<p>配置完后，安装个module测试下，我们就安装最常用的express模块，打开cmd窗口，<br>输入如下命令进行模块的全局安装：</p>
<p><img src="https://img2018.cnblogs.com/blog/1640046/201905/1640046-20190505133221085-534240766.png"></p>
<p>查看本机是否有node_modules文件：</p>
<p><img src="https://img2018.cnblogs.com/blog/1640046/201905/1640046-20190505133239096-317154071.png"></p>
<p><span style="color: rgba(255, 0, 0, 1)">试了删除.npmrc（该目录下：C:\Users\z_xia）也没成功，可能要注意：</span></p>
<p><span style="color: rgba(255, 0, 0, 1)">1.环境变量是否生效（必要时需要重启机）</span></p>
<p><span style="color: rgba(255, 0, 0, 1)">2.是否环境变量的path值是在在前排（重要）</span></p>
<p><span style="color: rgba(255, 0, 0, 1)">3.最笨的方法就是卸载，重头开始。</span></p>
<p><span style="color: rgba(255, 0, 0, 1)">就over啦</span></p>
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来源：https://www.cnblogs.com/xt-Corrine/p/10812503.html
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