How to use require () in angular 2 using systemjs?

Question

I am trying to use relative paths for templates in my components to use systemjs. (The reason I want to use relative paths is because ng-xi18n cannot deal with absolute paths at the moment.) I don't want to use this

moduleId: __moduleName

but rather something like:

templateUrl: require('../templates/app.html')

First, tsc noted an error that requires is not defined, and after a little research it turned out that someone might include dependencies for @ types / node to use the require function.

Now that I have done this, tsc compiles without errors, but if I open the application in a browser, it will show an error:

__ zone_symbol__error: Error: (SystemJS) require is not a function TypeError: require is not a function when executed

Since I cannot find a solution for this, I hope someone can help the frantic newbie angular2 solve this problem.

Thanks in advance!

Here are some code snippets from my application.

package.json:

{
  "name": "test",
  "version": "0.0.1",
  "scripts": {
    "start": "concurrently \"npm run tsc:w\" \"gulp serve\" ",
    "tsc": "tsc",
    "tsc:w": "tsc -w",
    "typings": "typings",
    "postinstall": "typings install",
    "i18n": "ng-xi18n -p ./tsconfig.json"
  },
  "dependencies": {
    "@angular/common": "~2.4.6",
    "@angular/compiler": "~2.4.6",
    "@angular/compiler-cli": "^2.4.6",
    "@angular/core": "~2.4.6",
    "@angular/forms": "~2.4.6",
    "@angular/http": "~2.4.6",
    "@angular/platform-browser": "~2.4.6",
    "@angular/platform-browser-dynamic": "~2.4.6",
    "@angular/platform-server": "^2.4.6",
    "@angular/router": "~3.4.6",
    "angular-in-memory-web-api": "~0.2.4",
    "core-js": "^2.4.1",
    "es6-shim": "^0.35.1",
    "rxjs": "5.0.1",
    "systemjs": "0.19.41",
    "zone.js": "^0.7.4"
  },
  "devDependencies": {
    "concurrently": "^3.1.0",
    "lite-server": "^2.2.2",
    "typescript": "^2.0.10",
    "typings": "^1.2.0",
    "gulp": "3.9.1",
    "gulp-connect": "3.2.1",
    "http-proxy-middleware": "0.13.0",
    "@types/node": "^7.0.0"
  }
}

tsconfig.json:

{
  "compilerOptions": {
    "target": "es5",
    "module": "system",
    "moduleResolution": "node",
    "outDir": "app/js",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false,
    "types": ["node"]
  },
  "exclude": [
    "node_modules",
    "typings/main",
    "typings/main.d.ts"
  ]
}

systemjs.config.js:

(function (global) {
    System.config({
        defaultJSExtension: true,
        paths: {
            'npm:': 'node_modules/'
        },
        map: {
            app: 'app',

            '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
            '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
            '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
            '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
            '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
            '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
            '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
            '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',

            'rxjs': 'npm:rxjs',
            'angular-in-memory-web-api':'npm:angular-in-memory-web-api/bundles/in-memory-web-api.umd.js'
        },

        packages: {
            app: {
                main: './main.js',
                defaultExtension: 'js'
            },
            rxjs: {
                defaultExtension: 'js'
            }
        }
    });
})(this);

app.component.ts:

import {Component} from '@angular/core';
import { LoginService } from '../services/login.service';
import { UserStatus } from '../models/userStatus';
import {SessionService} from "../services/session.service";
import {UserService} from "../services/user.service";
import {Router} from '@angular/router';

@Component({
    selector: 'main-app',
    template: require('../templates/app.html')

})

export class AppComponent {

}

Answer 1

According to the author of SystemJS :

The require statement is not defined to work inside ES, globals, or System.register modules in SystemJS, as it is something special for the CommonJS module format.

Instead, you can use the SystemJS text plugin to import any ES6-style text file. Thus, the component will look like this:

import { Component } from '@angular/core';
import template from '../templates/app.html!text';

@Component({
    selector: 'main-app',
    template: template
})
export class AppComponent {}