vue1.0升级到2.0

vue1.0升级到2.0并不是什么难事，它主要就是对vuejs的api做的一些变更，那么升级到2.0要怎么做呢？

首先，1.0和2.0它的脚手架有什么区别，它的区别主要就是配置文件的更改，

配置文件修改包括以下文件：

1.Package.json文件修改
2.Build目录修改
3.Config目录修改

如下图所示的项目目录：

上图就是项目源码的目录，那我们用脚手架安装1.0和2.0项目，它们最大的区别主要就是：（1）build目录下面的配置文件（2）config目录下面的配置文件（3）package.json依赖包（它们两个依赖的东西会有区别）

package.json升级

1.0-version

{
  "name": "sell",
  "version": "1.0.0",
  "description": "sell app",
  "author": "ustbhuangyi <[e-mail]>",
  "private": true,
  "scripts": {
    "dev": "node build/dev-server.js",
    "build": "node build/build.js",
    "test": "",
    "lint": "eslint --ext .js,.vue src test/unit/specs test/e2e/specs"
  },
  "dependencies": {
    "vue": "^1.0.21",
    "vue-router": "^0.7.13",
    "vue-resource": "^1.0.1",
    "babel-runtime": "^6.0.0",
    "better-scroll": "^0.1.7"
  },
  "devDependencies": {
    "babel-core": "^6.0.0",
    "babel-eslint": "^6.1.2",
    "babel-loader": "^6.0.0",
    "babel-plugin-transform-runtime": "^6.0.0",
    "babel-preset-es2015": "^6.0.0",
    "babel-preset-stage-2": "^6.0.0",
    "babel-register": "^6.0.0",
    "connect-history-api-fallback": "^1.1.0",
    "css-loader": "^0.23.0",
    "stylus-loader": "^2.1.1",
    "eslint": "^2.10.2",
    "eslint-friendly-formatter": "^2.0.5",
    "eslint-loader": "^1.3.0",
    "eslint-plugin-html": "^1.3.0",
    "eslint-config-standard": "^5.1.0",
    "eslint-plugin-promise": "^1.0.8",
    "eslint-plugin-standard": "^1.3.2",
    "eventsource-polyfill": "^0.9.6",
    "express": "^4.13.3",
    "extract-text-webpack-plugin": "^1.0.1",
    "file-loader": "^0.8.4",
    "function-bind": "^1.0.2",
    "html-webpack-plugin": "^2.8.1",
    "http-proxy-middleware": "^0.12.0",
    "json-loader": "^0.5.4",
    "ora": "^0.2.0",
    "shelljs": "^0.6.0",
    "url-loader": "^0.5.7",
    "vue-hot-reload-api": "^1.2.0",
    "vue-html-loader": "^1.0.0",
    "vue-loader": "^8.3.0",
    "vue-style-loader": "^1.0.0",
    "webpack": "^1.12.2",
    "webpack-dev-middleware": "^1.4.0",
    "webpack-hot-middleware": "^2.6.0",
    "webpack-merge": "^0.8.3"
  }
}

2.0-version

{
  "name": "sell",
  "version": "1.0.0",
  "description": "sell app",
  "author": "ustbhuangyi <[e-mail]>",
  "private": true,
  "scripts": {
    "dev": "node build/dev-server.js",
    "build": "node build/build.js",
    "test": "",
    "lint": "eslint --ext .js,.vue src test/unit/specs test/e2e/specs"
  },
  "keywords": [
    "vue",
    "vue-sell",
    "webapp"
  ],
  "dependencies": {
    "vue": "^2.2.1",
    "vue-resource": "1.0.3",
    "vue-router": "^2.2.0",
    "babel-runtime": "^6.0.0",
    "better-scroll": "^0.1.11"
  },
  "devDependencies": {
    "autoprefixer": "^6.4.0",
    "babel-core": "^6.0.0",
    "babel-eslint": "^7.0.0",
    "babel-loader": "^6.0.0",
    "babel-plugin-transform-runtime": "^6.0.0",
    "babel-preset-es2015": "^6.0.0",
    "babel-preset-stage-2": "^6.0.0",
    "babel-register": "^6.0.0",
    "chalk": "^1.1.3",
    "connect-history-api-fallback": "^1.1.0",
    "css-loader": "^0.25.0",
    "eslint": "^3.7.1",
    "eslint-friendly-formatter": "^2.0.5",
    "eslint-loader": "^1.5.0",
    "eslint-plugin-html": "^1.3.0",
    "eslint-config-standard": "^6.1.0",
    "eslint-plugin-promise": "^3.4.0",
    "eslint-plugin-standard": "^2.0.1",
    "eventsource-polyfill": "^0.9.6",
    "express": "^4.13.3",
    "extract-text-webpack-plugin": "^1.0.1",
    "file-loader": "^0.9.0",
    "friendly-errors-webpack-plugin": "^1.1.2",
    "function-bind": "^1.0.2",
    "html-webpack-plugin": "^2.8.1",
    "http-proxy-middleware": "^0.17.2",
    "json-loader": "^0.5.4",
    "semver": "^5.3.0",
    "opn": "^4.0.2",
    "ora": "^0.3.0",
    "shelljs": "^0.7.4",
    "url-loader": "^0.5.7",
    "vue-loader": "^11.1.4",
    "vue-style-loader": "^2.0.0",
    "stylus": "^0.54.5",
    "stylus-loader": "^2.1.1",
    "vue-template-compiler": "^2.2.1",
    "webpack": "^1.13.2",
    "webpack-dev-middleware": "^1.8.3",
    "webpack-hot-middleware": "^2.12.2",
    "webpack-merge": "^0.14.1"
  },
  "engines": {
    "node": ">= 4.0.0",
    "npm": ">= 3.0.0"
  }
}

我们从两个版本的package.json中可以看到，dependencies字段中的vue从^1.0.21升级到^2.2.1，vue-router从^0.7.13升级到^2.2.0。有些人，在项目中，vue用的是2.0，但是router用的是1.0，所以会报一些错误，这时候需要对router进行相应的升级。也可以看到2.0的dependencies和1.0的dependencies也是有区别的，那我们怎么改呢？很简单，我们可以用2.0的脚手架去初始化一个项目，把2.0里面的package.json中的依赖拷贝到1.0项目下的package.json中，覆盖了，然后再去执行一次npm install，就ok啦。这里讲的只是对vue和vue-router版本的升级，仅仅是是举个例子，在实际项目中，根据自己项目依赖的不同，会升级一些不同的依赖。

Build目录和Config目录

这两个目录主要就是把2.0里面的Build目录和Config目录拷贝到1.0里面，把1.0的覆盖了，当然覆盖的时候一定要注意你之前自己在1.0项目过程中的一些配置代码，也要把那些代码写到2.0里面去，这样就可以了。

重要的注释：

首先，上面的只是告诉你把vue和vue-router进行版本升级，但是版本升级了，那么代码肯定会有出入，肯定需要对1.0的vue代码进行部分修改，以适应2.0的vue。那么，你需要在当前项目下运行迁移工具（vue-migration-helper）。我们非常谨慎地把高级 Vue 升级过程简化为使用一个简单的命令行工具。当工具识别出旧有的特性后，就会告知你并给出建议，同时附上关于详细信息的链接，如下图所示。

具体的迁移方法，请参照https://cn.vuejs.org/v2/guide...