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typescriptbrowserifyangularangular-ngmodel

Angular 2 NgModel doesn't work

I'm starting my transition from Angular 1 to Angular 2. I tried to do simple things first so I wrote a component:

import {Component} from 'angular2/core';
import {NgModel} from 'angular2/common';

@Component({
  selector: 'app',
  template: `
    <div>
    <div>Value is {{ value }}</div>
    <input type="text" [(ngModel)]="value" />
    </div>
  `,
  directives: [NgModel]
})
export class App {
  value: string;
};

<!DOCTYPE html>
<html>
  <head>
    <title>Angular2</title>
  </head>
  <body>
    <app></app>

    <script src="./js/bundle.js"></script>
  </body>
</html>

(bundle.js do only the bootstrapping of app component)

I expect after I type something into the textbox, I should get the same text in the div. But it doesn't happen.

Why doesn't my code work?

Regards, Sarun

UPDATE I assume I may configure my build system incorrectly, so I include my gulpfile.js, package.json and boot.ts.

gulpfile.js

var gulp = require('gulp');
var browserify = require('browserify');
var tsify = require('tsify');
var source = require('vinyl-source-stream');
var uglify = require('gulp-uglify');
var buffer = require('vinyl-buffer');
var sourcemaps = require('gulp-sourcemaps');

gulp.task('ts', function() {
  browserify({
    debug: true
  })
  .add('source/ts/boot.ts')
  .plugin(tsify)
  .bundle()
  .pipe(source('bundle.js'))
  .pipe(buffer())
  .pipe(sourcemaps.init({
    loadMaps: true
  }))
  .pipe(uglify())
  .pipe(sourcemaps.write())
  .pipe(gulp.dest('build/js'));
});

gulp.task('watch', function() {
  gulp.watch('source/ts/**/*.ts', ['ts']);
});

package.json

{
  "name": "hello-angular2",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "angular2": "^2.0.0-beta.0",
    "es6-promise": "^3.0.2",
    "es6-shim": "^0.34.0",
    "reflect-metadata": "^0.1.2",
    "rxjs": "^5.0.0-beta.0",
    "zone.js": "^0.5.10"
  },
  "devDependencies": {
    "browserify": "^12.0.1",
    "gulp": "^3.9.0",
    "gulp-exec": "^2.1.2",
    "gulp-live-server": "0.0.29",
    "gulp-sourcemaps": "^1.6.0",
    "gulp-uglify": "^1.5.1",
    "gulp-watch": "^4.3.5",
    "lite-server": "^1.3.2",
    "tsify": "^0.13.1",
    "typescript": "^1.7.5",
    "vinyl-buffer": "^1.0.0",
    "vinyl-source-stream": "^1.1.0"
  }
}

boot.ts

import 'reflect-metadata';
import {bootstrap} from 'angular2/platform/browser';
import {App} from './app';

bootstrap(App);
Solution

  • After a long dig in to the docs and a long googling, I finally found the answer.

    (This answer may change in the future, refer to Angular Documentation)

    https://github.com/angular/angular/blob/master/modules/angular2/docs/bundles/overview.md

    As @pixelbits mentioned, I missed a couple of dependencies rxjs and angular2-polyfills, the latter is a polyfill for two other dependencies zone.js and reflect-metadata and this must be included in a <script> tag only.

    Things I need to do is:

    1. Remove reflect-metadata import from boot.ts and add rxjs import to it.
    2. Add a <script> tag for angular2-polyfills.js to index.html

    And voila! It works as expected.

    Thanks to @pixelbits, @Zyzle and @Günter Zöchbauer for helping me.