按照我发现的here指南,在Angular中重建演示登录和注册页面应用程序。目前正在获取
ERROR in src/app/_services/authentication.service.ts(10,35): error TS2304: Cannot find name 'config'
搜索了类似的问题here和here。第一个链接解决了webpack的问题,但已过时,第二个链接则完全不相关。我在tsconfig.app.json和tsconfig.spec.json中都添加了“ webpack-env”,我还按照以下instructions更新了webpack和webpack cli。
请参阅以下受影响的代码: webpack.config.js
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
module.exports = {
entry: './src/main.ts',
module: {
rules: [
{
test: /\.ts$/,
use: ['ts-loader', 'angular2-template-loader'],
exclude: /node_modules/
},
{
test: /\.(html|css)$/,
loader: 'raw-loader'
},
]
},
resolve: {
extensions: ['.ts', '.js']
},
plugins: [
new HtmlWebpackPlugin({
template: './src/index.html',
filename: 'index.html',
inject: 'body'
}),
new webpack.DefinePlugin({
// global app config object
config: JSON.stringify({
apiUrl: 'http://localhost:4000'
})
})
],
optimization: {
splitChunks: {
chunks: 'all',
},
runtimeChunk: true
},
devServer: {
historyApiFallback: true
}
};
authentication.service.ts
import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { map } from 'rxjs/operators';
@Injectable()
export class AuthenticationService {
constructor(private http: HttpClient) { }
login(username: string, password: string) {
return this.http.post<any>(`${config.apiUrl}/users/authenticate`, { username: username, password: password })
.pipe(map(user => {
// login successful if there's a jwt token in the response
if (user && user.token) {
// store user details and jwt token in local storage to keep user logged in between page refreshes
localStorage.setItem('currentUser', JSON.stringify(user));
}
return user;
}));
}
logout() {
// remove user from local storage to log user out
localStorage.removeItem('currentUser');
}
}
user.service.ts
import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { User } from '../_models/user';
@Injectable()
export class UserService {
constructor(private http: HttpClient) { }
getAll() {
return this.http.get<User[]>(`${config.apiUrl}/users`);
}
getById(id: number) {
return this.http.get(`${config.apiUrl}/users/` + id);
}
register(user: User) {
return this.http.post(`${config.apiUrl}/users/register`, user);
}
update(user: User) {
return this.http.put(`${config.apiUrl}/users/` + user.id, user);
}
delete(id: number) {
return this.http.delete(`${config.apiUrl}/users/` + id);
}
}
tsconfig.app.json
{
"extends": "../tsconfig.json",
"compilerOptions": {
"outDir": "../out-tsc/app",
"module": "es2015",
"types": [
"webpack-env"
]
},
"exclude": [
"src/test.ts",
"**/*.spec.ts"
]
}
tsconfig.spec.json
{
"extends": "../tsconfig.json",
"compilerOptions": {
"outDir": "../out-tsc/spec",
"module": "commonjs",
"types": [
"jasmine",
"node",
"webpack-env"
]
},
"files": [
"test.ts",
"polyfills.ts"
],
"include": [
"**/*.spec.ts",
"**/*.d.ts"
]
}
答案 0 :(得分:5)
请参见Angular 6 Custom Typings File
Path: /src/typings.d.ts
自定义类型文件用于声明在angular应用程序外部创建的类型,因此TypeScript编译器可以识别它们,并且不会给您有关未知类型的错误。此类型文件包含由webpack创建的全局配置对象的声明(请参见下面的webpack.config.js)。
// so the typescript compiler doesn't complain about the global config object declare var config: any;