Angular 8 配置文件

项目在开发时与发布后的配置文件（比如url）是有区别的，因此需要根据不同的场景使用不同的配置。

环境

>ng version_                      _                 ____ _     ___/ \   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|/ △ \ | '_ \ / _` | | | | |/ _` | '__|   | |   | |    | |/ ___ \| | | | (_| | |_| | | (_| | |      | |___| |___ | |/_/   \_\_| |_|\__, |\__,_|_|\__,_|_|       \____|_____|___||___/Angular CLI: 7.3.3
Node: 10.13.0
OS: win32 x64
Angular: 7.2.6
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... routerPackage                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.13.3
@angular-devkit/build-angular     0.13.3
@angular-devkit/build-optimizer   0.13.3
@angular-devkit/build-webpack     0.13.3
@angular-devkit/core              7.3.3
@angular-devkit/schematics        7.3.3
@angular/cli                      7.3.3
@ngtools/webpack                  7.3.3
@schematics/angular               7.3.3
@schematics/update                0.13.3
rxjs                              6.3.3
typescript                        3.2.4
webpack                           4.29.0

思路

分别配置两套 Config，dev、prod，之后在发布网站时选择不同的配置项进行发布即可。

配置

打开 angular.json -> projects -> 项目名 -> architect -> build -> configurations -> production。复制该配置以设置更多的配置项，如下：

"configurations": {"prod": {"fileReplacements": [{"replace": "src/environments/environment.ts","with": "src/environments/environment.prod.ts"}],"optimization": true,"outputHashing": "all","sourceMap": false,"extractCss": true,"namedChunks": false,"aot": true,"extractLicenses": true,"vendorChunk": false,"buildOptimizer": true,"budgets": [{"type": "initial","maximumWarning": "2mb","maximumError": "5mb"}]},"dev": {"fileReplacements": [{"replace": "src/environments/environment.ts","with": "src/environments/environment.dev.ts"}],"optimization": true,"outputHashing": "all","sourceMap": false,"extractCss": true,"namedChunks": false,"aot": true,"extractLicenses": true,"vendorChunk": false,"buildOptimizer": true,"budgets": [{"type": "initial","maximumWarning": "2mb","maximumError": "5mb"}]}
}

上面的配置中，配置了 2 个配置项，分别是 dev 与 prod。
dev 与 prod 是配置中节点的名字，随后 build 时需要用到他们。

编辑 dev 与 prod 环境文件

在 src -> environments 中复制 environments.prod.ts， 粘贴后更改名字为 environments.dev.ts。
environment.ts 文件内容：

export const environment = {production: false,envType: 'test'
};

environment.dev.ts 文件内容：

export const environment = {production: false,envType: 'dev'
};

environment.prod.ts 文件内容：

export const environment = {production: true,envType: 'prod'
};

此时的 environments 文件夹应该是这样的
├── environment.dev.ts
├── environment.prod.ts
└── environment.ts

使用配置项

app.component.html：

{{envType}}

app.component.ts：

import { Component, OnInit } from '@angular/core';
import { environment } from 'src/environments/environment';@Component({selector: 'app-root',templateUrl: './app.component.html',styleUrls: ['./app.component.scss']
})
export class AppComponent implements OnInit {public envType: string;constructor() { }ngOnInit(): void {this.envType = environment.envType;}
}

为了方便测试，打开 angular.json -> projects -> 项目名 -> architect -> serve -> configurations 修改如下：

"configurations": {"prod": {"browserTarget": "ng-practice:build:prod"},"dev": {"browserTarget": "ng-practice:build:dev"}
}

分别执行： ng s -c=dev 与 ng s -c=prod 与 ng s，会看到不同的结果：dev, prod, test。

在发布时，需要将命令稍作修改: ng b --prod -c=prod。

本文来自互联网用户投稿，文章观点仅代表作者本人，不代表本站立场，不承担相关法律责任。如若转载，请注明出处。 如若内容造成侵权/违法违规/事实不符，请点击【内容举报】进行投诉反馈！