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Angular项目如何升级至Angular6步骤全纪录

时间:2021-01-23 10:14:26 | 栏目:AngularJS | 点击:

前言

前段时间将所负责的 Angular2 项目升级到了 Angular5 版本,这两天又进行了升级至 Angular6 的尝试。总的来说,两次升级过程比较类似,也不算复杂。

2018年5月4日,Angular6.0.0版正式发布,新版本主要关注底层框架和工具链,目的在于使其变得更小更快。

特性的小改动:

0. 项目特点

该项目有如下特点:

项目升级后也没有使用 @angular/cli,继续采用 fis3 作为编译工具。这一是因为许多历史悠久的代码风格无法通过 tslint 校验,ng build 根本无法执行通过;二是因为项目的部分代码编写和构建与发布流程使用了一些 fis3 的特性,改造成本较大。而且经过比对,@angular/cli 的编译过程并没有比 fis3 好很多。

下面简要介绍一下升级的过程和方法。

1. 更新 package.json 的依赖

将 Angular 依赖库改为 ^6.1.0 版本,并且注意项目依赖的 Angular 组件库的兼容版本更新。如我们的项目依赖有如下变更:

注意:一些组件库的 API 也会有不兼容更新,相关代码逻辑应作改进(可在升级完成后根据文档和错误提示去调试和修改)。

升级后的项目依赖参考:

{
 "devDependencies": {
 "@compodoc/compodoc": "^1.1.5",
 "@lzwme/simple-mock": "~0.0.8",
 "@types/core-js": "^0.9.46",
 "@types/jasmine": "~2.8.6",
 "@types/jasminewd2": "~2.0.3",
 "@types/node": "~8.9.4",
 "@types/webpack": "~2.2.14",
 "angular2-template-loader": "~0.6.2",
 "awesome-typescript-loader": "~3.2.3",
 "body-parser": "1.17.0",
 "cookie-parser": "1.4.3",
 "cross-env": "^5.1.6",
 "debug": "2.6.1",
 "ejs": "2.5.6",
 "express": "4.15.0",
 "fis-optimizer-htmlmin": "0.1.2",
 "fis-optimizer-png-compressor": "0.2.0",
 "fis-parser-less": "0.1.3",
 "fis-parser-pug": "0.0.1",
 "fis-postpackager-replace": "0.0.3",
 "fis3": "3.4.39",
 "fis3-deploy-local-supply": "0.0.2",
 "fis3-hook-commonjs": "0.1.27",
 "fis3-hook-node_modules": "2.3.1",
 "fis3-hook-relative": "2.0.3",
 "fis3-packager-deps-pack": "0.1.2",
 "fis3-parser-typescript": "^1.2.2",
 "fis3-postpackager-loader": "2.1.11",
 "fis3-preprocessor-cssprefixer": "0.0.2",
 "fis3-preprocessor-js-require-css": "0.1.3",
 "fis3-preprocessor-js-require-file": "0.1.3",
 "fis3-preprocessor-ng2-inline": "0.0.1",
 "fs-extra": "^6.0.1",
 "http-proxy": "1.16.2",
 "husky": "^0.14.3",
 "istanbul-instrumenter-loader": "^3.0.1",
 "jasmine-core": "^3.1.0",
 "karma": "^2.0.2",
 "karma-chrome-launcher": "^2.2.0",
 "karma-coverage": "^1.1.1",
 "karma-coverage-istanbul-reporter": "^2.0.1",
 "karma-jasmine": "^1.1.2",
 "karma-jasmine-html-reporter": "^1.1.0",
 "karma-mocha-reporter": "^2.2.5",
 "karma-remap-coverage": "^0.1.5",
 "karma-sonarqube-unit-reporter": "^0.0.14",
 "karma-sourcemap-loader": "~0.3.7",
 "karma-webpack": "^3.0.0",
 "less": "^3.0.4",
 "less-loader": "^4.1.0",
 "liftoff": "2.3.0",
 "lint-staged": "^7.1.3",
 "minimist": "1.2.0",
 "morgan": "1.8.1",
 "prettier": "^1.13.5",
 "pug": "^2.0.3",
 "pug-html-loader": "^1.1.5",
 "raw-loader": "~0.5.1",
 "serve-favicon": "2.4.1",
 "stylelint": "^9.4.0",
 "stylelint-config-prettier": "^4.0.0",
 "supervisor": "^0.12.0",
 "to-string-loader": "^1.1.5",
 "tslint": "^5.10.0",
 "typedoc": "^0.11.1",
 "typescript": "^2.8.3",
 "webpack": "~3.6.0"
 },
 "dependencies": {
 "@angular/animations": "^6.1.0",
 "@angular/common": "^6.1.0",
 "@angular/compiler": "^6.1.0",
 "@angular/core": "^6.1.0",
 "@angular/forms": "^6.1.0",
 "@angular/http": "^6.1.0",
 "@angular/platform-browser": "^6.1.0",
 "@angular/platform-browser-dynamic": "^6.1.0",
 "@angular/router": "^6.1.0",
 "@ngrx/router-store": "6.1.0",
 "@ngrx/store": "^6.1.0",
 "@ngx-translate/core": "^10.0.2",
 "@ngx-translate/http-loader": "^3.0.0",
 "angular-tree-component": "^7.2.1",
 "buffer": "4.9.1",
 "core-js": "^2.5.7",
 "fis-mod": "1.0.1",
 "is-buffer": "1.1.4",
 "jquery": "1.12.4",
 "moment": "2.18.1",
 "ngrx-store-freeze": "0.2.4",
 "ngrx-store-logger": "0.2.2",
 "process": "0.11.9",
 "reflect-metadata": "0.1.12",
 "rxjs": "^6.0.0",
 "rxjs-compat": "^6.2.2",
 "throttle-debounce": "^2.0.1",
 "zone.js": "0.8.26"
 }
}

2. 添加 rxjs-compat 依赖

为了兼容 rxjs 5 的用法,必须引入 rxjs-compat。

添加依赖:

yarn add rxjs-compat

然后在项目入口文件 main.ts 中引入它:

import 'rxjs-compat';

注意,后续的开发应有意识地以 rxjs6 的新写法去编码。

当然,如决定改掉 rxjs5 的旧写法,可以移除对 rxjs-compat 的引入,参照浏览器错误提示去一一修改即可。

3. 按官方指引和项目实际情况选择性操作

打开 Angular 官方升级指引网站 https://update.angular.io 按提示和项目实际情况操作。

实际上项目没有太多高级的用法,需要修改的内容并不多。大致有以下几点:

npm install -g rxjs-tslint
rxjs-5-to-6-migrate -p src/tsconfig.app.json

以上操作完成后,尝试启用项目构建编译,如无报错即已成功升级。

总结:

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