webpack+vue+koa+mongoDB,从零开始搭建一个网站

github 地址 https://github.com/wangxiaoxi...

webpakc+vue的搭建
1.新建项目文件夹（see-films);
2.npm init //初始化项目
3.搭建webpack的基本框架

const path = require("path");
const webpack = require("webpack");
module.exports = {
    entry:{
        entry:"./src/entry.js"
    },
    output:{
        path:path.resolve( __dirname,"dist" ),
        filename:"[name].js"
    },
    module:{

    },
    plugins:[

    ],
    devServer:{    
        
    }
};

同时安装依赖

npm i -D webpack(版本号4.14.0)  
npm i -D webpack-cli 

4.webpack的热更新

npm i -D webpack-dev-server 
devServer:{    
        contentBase:path.resolve( __dirname,"dist" ),
        host:"127.0.0.1",
        compress:true,
        port:9001
    }

创建一个src文件夹，创建一个entry.js文件测试能否打包，发现报错 缺少mode
在webpacl.config.js文件里面的入口entry上面加上mode:"development",现在先是在本地跑起来，如果是生产环境的话mode:"production"，此时再进行打包----打包成功。第一步完成。

5.安装模板文件依赖
npm i -D html-webpack-plugin
在webpack.config.js文件中的plugins中
plugins:[

    new htmlPlugin({
        minify:{
            removeAttributeQuotes:true
        },
        hash:true,
        template:"./src/index.html"
    })
]

在src文件夹下面创建index.html
然后webpack测试能否打包成功
此时的目录结构是这样子的!

图片描述

6.vue的搭建!!!

根目录新建文件夹client
创建文件 main.js和App.vue
在根目录创建index.html
然后修改webpack.config.js文件中的入口和plugin插件的模板

并安装依赖
npm i -S vue
npm i -D vue-template-complier
npm i -D extract-text-webpack-plugin
npm i -D vue-loader vue-style-loader css-loader

此时的webpack.config.js是这样的

const path = require("path");
const webpack = require("webpack");
const htmlPlugin = require("html-webpack-plugin");
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const VueLoaderPlugin = require('vue-loader/lib/plugin');
module.exports = {
    mode:"development",
    resolve: {
        extensions: ['.js', '.vue', '.json'],
        alias: {
            'vue$': 'vue/dist/vue.esm.js'
        }
    },
    entry:{
        entry:"./client/main.js",
        vue:"vue"
    },
    output:{
        path:path.resolve( __dirname,"dist" ),
        filename:"[name].js"
    },
    module:{
        rules:[
            {
                test: /\.vue$/,
                loader: 'vue-loader',
                options: {
                    loaders: {
                        css: ExtractTextPlugin.extract({
                            use: {loader: 'css-loader'},
                            fallback: 'vue-style-loader'
                        })
                    }
                }
            }
        ]
    },
    plugins:[
        new htmlPlugin({
            minify:{
                removeAttributeQuotes:true
            },
            hash:true,
            template:"./index.html"
        }),
        new VueLoaderPlugin()，
        new ExtractTextPlugin("css/index.css")
    ],
    devServer:{    
        contentBase:path.resolve( __dirname,"dist" ),
        host:"127.0.0.1",
        compress:true,
        port:9001
    }
};

到此处就是一个最基础的vue架构；
此时的目录结构如下
图片描述

看到这里，相信你也测试过，然后发现有个问题，就是在.vue文件里面的style中对样式进行修改会报错，原因是webpack4.x版本得使用mini-css-extract-plugin代替原来的extract-text-webpack-plugin，修改之后如下

const path = require("path");
const webpack = require("webpack");
const htmlPlugin = require("html-webpack-plugin");
const VueLoaderPlugin = require('vue-loader/lib/plugin');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
    devtool:"cheap-module-eval-source-map",
    mode:"development",
    resolve: {
        extensions: ['.js', '.vue', '.json'],
        alias: {
            'vue$': 'vue/dist/vue.esm.js'
        }
    },
    entry:{
        entry:"./client/main.js",
        vue:"vue"
    },
    output:{
        path:path.resolve( __dirname,"dist" ),
        filename:"[name].js",
        publicPath:"http://127.0.0.1:9001/"
    },
    module:{
        rules:[
            {
                test: /\.js$/,
                use: 'babel-loader',
                exclude: /node_modules/
            },
            {
                test: /\.css$/,
                use:[
                    MiniCssExtractPlugin.loader,
                    {
                        loader: 'css-loader?modules=false',
                        options: {
                            importLoaders: 1,
                            minimize: true
                        }
                    }
                ]
            },
            {
                test: /\.vue$/,
                loader: 'vue-loader'
            }
        ]
    },
    plugins:[
        new htmlPlugin({
            minify:{
                removeAttributeQuotes:true
            },
            hash:true,
            template:"./index.html"
        }),
        new VueLoaderPlugin(),
        new MiniCssExtractPlugin({
            filename: "[name].css",
            chunkFilename: "[id].css"
        })
    ],
    devServer:{    
        contentBase:path.resolve( __dirname,"dist" ),
        host:"127.0.0.1",
        compress:true,
        port:9001
    }
};

7.VUE热更新

只需要安装vue-hot-reload-api依赖 配合就能够轻松实现。

8.VUE路由

安装vue-router 然后修改main.js如下，并在同层目录生成router.config.js,此时的就能根据你的喜好去建立路由了。

import Vue from 'vue';
import App from './App';

import VueRouter from 'vue-router';
Vue.use(VueRouter);
import routes from './router.config.js';
const router = new VueRouter({
    routes: routes
});

new Vue({
  el: '#app',
  router,
  components: { App },
  template: '<App/>'
})

9.KOA的引入和基础测试

const Koa = require('koa');
const Rrouter = require('koa-router');
const cors = require('koa2-cors');

( async () => {
    const app = new Koa();
    
    app.use( cors() );
    
    const router = new Rrouter();
    router.get('/getFirstMessage',async ctx=>{
        ctx.body = {
            message:"get"
        } 
    });
    app.use(router.routes()).use(router.allowedMethods());
    app.listen(9001 ,async ()=>{
        console.log("CONNECTED")
    });
} )()

http://127.0.0.1:9001/getFirstMessage
此时就能够通过接口拿到数据

10.改装路由---使用装饰器

在server文件夹下建立如上文件夹和文件

npm i -S babel-core babel-plugin-transform-decorators-legacy babel-polyfill ramda lodash babel-preset-stage-0

/*装饰器注册*/
require('babel-core/register')();
require('babel-polyfill');

const Koa = require('koa');

/*该方法用来批量引入中间件*/
const useMiddlewares = require('./lib/useMiddlewares');

( async () => {
    const app = new Koa();

    await useMiddlewares(app);

    app.listen(9001 ,async ()=>{
        console.log("CONNECTED")
    });
} )()