使用typescript開發angular模塊(編寫模塊)

前言

以前在使用typescript開發angular模塊(發佈npm包)一文中基本曉得了怎麼發佈一個typescript寫的npm包。可是離目標還有段距離。

開始開發模塊

開發過程不是本身想了那麼順利，可是仍是有點可取的地方。

安裝依賴項目

"dependencies": {
    "@angular/common": "^5.0.2",
    "@angular/core": "^5.0.2",
    "moment": "^2.22.1",
    "rxjs": "^5.5.2",
    "zone.js": "^0.8.4"
  },
  "devDependencies": {
    "@types/core-js": "^0.9.35",
    "typescript": "^2.8.1",
    "typings": "^2.1.1"
  }

配置tsconfig.json文件

{
  "compilerOptions": {
    /* Basic Options */
    "typeRoots": [                 // 主要配置了這個
      "node_modules/@types"
    ],
    "lib": [                // 還有這個
      "es2017",
      "dom"
    ],
    "target": "es5",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
    //"module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    // "lib": [],                             /* Specify library files to be included in the compilation. */
    // "allowJs": true,                       /* Allow javascript files to be compiled. */
    // "checkJs": true,                       /* Report errors in .js files. */
    // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
    "declaration": true,                   /* Generates corresponding '.d.ts' file. */
    // "sourceMap": true,                     /* Generates corresponding '.map' file. */
    // "outFile": "./",                       /* Concatenate and emit output to single file. */
    // "outDir": "./",                        /* Redirect output structure to the directory. */
    // "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
    // "removeComments": true,                /* Do not emit comments to output. */
    // "noEmit": true,                        /* Do not emit outputs. */
    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
    /* Strict Type-Checking Options */
    "strict": true,                           /* Enable all strict type-checking options. */
    // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
    // "strictNullChecks": true,              /* Enable strict null checks. */
    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */

    /* Additional Checks */
    // "noUnusedLocals": true,                /* Report errors on unused locals. */
    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */

    /* Module Resolution Options */
    // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
    // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
    // "typeRoots": [],                       /* List of folders to include type definitions from. */
    // "types": [],                           /* Type declaration files to be included in compilation. */
    // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
    "esModuleInterop": true,                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */

    /* Source Map Options */
    // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
    // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */

    /* Experimental Options */
    "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
    "emitDecoratorMetadata": true         /* Enables experimental support for emitting type metadata for decorators. */
  }
}

編寫代碼

像寫普通的angular模塊同樣

index.ts

import { NgModule } from '@angular/core';
import {CommonModule} from "@angular/common";
import {BlogApiService} from "./provider";

@NgModule({
    imports: [
        CommonModule
    ],
    providers:    [ BlogApiService ],
})
export class MzcNgApiModule { }

發佈使用

彷佛哪裏沒有配置正確，引入MzcNgApiModule 來使用時編譯要報錯。可是引入BlogApiService使用卻很正常

在咱們的angular項目中安裝

npm i mzc-ng-api

能正常使用的狀況以下

import { Injectable } from '@angular/core';
import {HttpClient} from '@angular/common/http';
import {BlogApiService} from  "mzc-ng-api/src/provider"
export * from "mzc-ng-api/src/provider"

@Injectable()
export class BlogService extends BlogApiService{
  constructor(protected http: HttpClient) {
    super(http)
  }
}

編譯經過，在下面的地方能正確調用BlogApiService裏的方法

import {BlogService, PreNoteDto,GetNoteDto} from "../blog.service";

export class NoteListComponent implements OnInit {
  preNoteList:PreNoteDto[]=[];
  loadMore = false;
  loading =false;
  key="";

  constructor(private router: Router,
  private blogService :BlogService
  ) { }

  ngOnInit() {
    this.getNoteList(true);
  }
  getNoteList(f=false){
    this.loading= true;
    if(f)this.preNoteList =[];
    const param = new GetNoteDto();
    param.key = this.key;
    param.SkipCount = this.preNoteList.length;
    this.blogService.GetNoteList(param).do(()=>{
      this.loading = false;
    }).subscribe(m=> {
      m.items.forEach((v,i)=>{
        v.content = marked(v.content);
        this.preNoteList.push(v);
      });
      this.loadMore = m.totalCount>this.preNoteList.length;
    });
  }
}

不能正常使用的方法以下

在app.module.ts中

import {MzcNgApiModule} from 'mzc-ng-api'

  imports: [
    RouterModule,
    MzcNgApiModule,
    BrowserModule,
    NgZorroAntdModule.forRoot(),
    RoutesModule,
    BrowserAnimationsModule
  ],

這樣引入進來，尚未使用編譯都會報錯。錯誤內容幾乎也時看不明白，先記錄下來，往後慢慢解決。

未完待續

源碼地址

https://github.com/yiershan/MZC-Ng-Api