I'm working on an Angular2 project and I'm looking for a way to concatenate all my JavaScript files that were created from TypeScript in Gulp and then include them in my index

Question

I'm working on an Angular2 project and I'm looking for a way to concatenate all my JavaScript files that were created from TypeScript in Gulp and then include them in my index

How can I concatenate all JavaScript files generated from typescript in my Angular2 project with Gulp, and then add them to my index.html file?

I am using Angular2, typescript, and gulp, but currently, I am not concatenating the javascript files it generates from the typescript files.

I am struggling to achieve this and add them to my index.html file. Additionally, I need cache busting to ensure that browsers request the new javascript file.

This is a snippet of my index.html file:

<!DOCTYPE html>
<html lang="en" prefix="og: http://ogp.me/ns#" xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <title>My App</title>
    <base href="/"></base>
    <meta content="IE=edge, chrome=1" http-equiv="X-UA-Compatible"/>
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0, minimum-scale=0.5, user-scalable=yes"/>

    <!-- Css libs -->
    <link rel="stylesheet" type="text/css" href="/css/styles.css" /> 

    <!-- inject:css -->    
       <!-- <link rel="stylesheet" href="/css/styles.81dd14d5.css">     -->
    <!-- endinject -->

    <!-- Js libs -->    
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/es6-shim/0.34.2/es6-shim.min.js"></script>    
    <script type="text/javascript" src="/safariPolyFix.js"></script>    
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.18.4/system.src.js"></script>   

    <script>
        System.config({
            transpiler: 'typescript',
            defaultJSExtensions: true,  
            typescriptOptions: {
                emitDecoratorMetadata: true,
            },          
            packages: {
                'angular2-google-maps': {
                  defaultExtension: 'js'
                }
            }
        });       
    </script>

    <script type="text/javascript" src="https://code.angularjs.org/2.0.0-beta.0/angular2-polyfills.js"></script>
    <script type="text/javascript" src="https://code.angularjs.org/tools/typescript.js"></script>
    <script type="text/javascript" src="https://code.angularjs.org/2.0.0-beta.0/Rx.js"></script>

    <script type="text/javascript" src="https://code.angularjs.org/2.0.0-beta.0/angular2.js"></script>
    <script type="text/javascript" src="https://code.angularjs.org/2.0.0-beta.0/router.js"></script>
    <script type="text/javascript" src="https://code.angularjs.org/2.0.0-beta.0/http.js"></script>  

    <script type="text/javascript" src="/firebase/firebaseNew.js"></script>   
  </head>

  <body id="container">

    <app></app>

    <script type="text/javascript">  
      System.import('/app/app.component.js');
    </script>
  </body>
</html>

This is part of my gulp configuration:

var gulp = require('gulp');
var sass = require('gulp-sass');
var inject = require('gulp-inject');
var del = require('delete');
var minifyCss = require('gulp-minify-css');
var uglify = require('gulp-uglify');

var CacheBuster = require('gulp-cachebust');
var cachebust = new CacheBuster();

//1. Delete styles.css
gulp.task('deleteStyle', function() {

    setTimeout(function () {
        del.promise(['src/css/styles.*.css'])
          .then(function() {            
                console.log("Deleted original styles.css");         
                return true;
          });      
    }, 1000);  

});

//2. Generate new styles.css
gulp.task('addStyles', function() {

    setTimeout(function () {

        gulp.src('src/sass/styles.scss')
            .pipe(sass().on('error', sass.logError))
            .pipe(minifyCss({compatibility: 'ie8'}))
            .pipe(cachebust.resources())
            .pipe(gulp.dest('src/css/'))

        console.log("Added and minified style.css");     

    }, 3000); 

});

//3. Inject new style.css into index.html file
gulp.task('injectStyle', function() {

    setTimeout(function () {
          var target = gulp.src('src/index.html');
          var sources = gulp.src(['src/css/styles.*.css'], {read: false});

          console.log("Injected stylesheet to index.html file");

          return target.pipe(inject(sources))
            .pipe(gulp.dest('./src'));

    }, 5000); 

});

//Use for product release.
gulp.task('default', ['deleteStyle', 'addStyles', 'injectStyle']);

This is my attempt at concatenating the js with cache busting, which seems to work fine now. The challenge lies in linking the all.46f5af42.js file to the index.html?

Here's the corresponding gulp code:

gulp.task('getAllJsFiles', function() {

    setTimeout(function () {

        gulp.src('src/app/**/**/*.js')
            .pipe(concat('all.js'))
            .pipe(cachebust.resources())
            .pipe(gulp.dest('src/js'));

    }, 8000); 

});

I have also successfully added the concatenated and cache busted js file to the index.html:

<!-- inject:js -->
<script src="/src/js/all.46f5af42.js"></script>
<!-- endinject -->

However, I am unsure how to integrate these changes to make everything work correctly?

This is the current state of my console output:

https://i.sstatic.net/zT3AJ.png

If anyone could assist me in implementing these modifications to my existing code, I would greatly appreciate it, as I prefer not to start over by downloading a new angular2 seed app and transferring my current application. Thank you in advance.

javascript typescript gulp angular

Answer 1

Answer №1

It's not recommended to concatenate modules like this because they will remain anonymous. To address this, you should make use of the outFile option. By doing so, all modules will be compiled into a single JS file with registered names.

Take a look at this example, specifically focusing on the first parameter of the System.register function.

Modules as anonymous

System.register([ 'dep1', 'dep2', function(exports_1, context_1) {
  (...)
}

Modules with registered names

System.register('module1', [ 'dep1', 'dep2', function(exports_1, context_1) {
  (...)
}

System.register('module2', [ 'dep1', 'dep2', function(exports_1, context_1) {
  (...)
}

Here is an example of implementation in a gulp file:

gulp.task('app-bundle', function () {
  var tsProject = ts.createProject('tsconfig.json', {
    typescript: require('typescript'),
      outFile: 'app.js'
  });

  var tsResult = gulp.src('app/**/*.ts')
                .pipe(ts(tsProject));

  return tsResult.js
                .pipe(uglify())
                .pipe(gulp.dest('./dist'));
});

Moreover, consider using htmlreplace to update the script elements with the generated JS files. Here's an illustration of how to do that:

gulp.task('html', function() {
  gulp.src('index.html')
    .pipe(htmlreplace({
      'vendor': 'vendors.min.js',
      'app': 'app.min.js',
      'boot': 'boot.min.js'
    }))
    .pipe(gulp.dest('dist'));
});

If you need further guidance, check out this helpful question:

How do I actually deploy an Angular 2 + Typescript + systemjs app?

Answer 2

It's not recommended to concatenate modules like this because they will remain anonymous. To address this, you should make use of the outFile option. By doing so, all modules will be compiled into a single JS file with registered names.

Take a look at this example, specifically focusing on the first parameter of the System.register function.

Modules as anonymous

System.register([ 'dep1', 'dep2', function(exports_1, context_1) {
  (...)
}

Modules with registered names

System.register('module1', [ 'dep1', 'dep2', function(exports_1, context_1) {
  (...)
}

System.register('module2', [ 'dep1', 'dep2', function(exports_1, context_1) {
  (...)
}

Here is an example of implementation in a gulp file:

gulp.task('app-bundle', function () {
  var tsProject = ts.createProject('tsconfig.json', {
    typescript: require('typescript'),
      outFile: 'app.js'
  });

  var tsResult = gulp.src('app/**/*.ts')
                .pipe(ts(tsProject));

  return tsResult.js
                .pipe(uglify())
                .pipe(gulp.dest('./dist'));
});

Moreover, consider using htmlreplace to update the script elements with the generated JS files. Here's an illustration of how to do that:

gulp.task('html', function() {
  gulp.src('index.html')
    .pipe(htmlreplace({
      'vendor': 'vendors.min.js',
      'app': 'app.min.js',
      'boot': 'boot.min.js'
    }))
    .pipe(gulp.dest('dist'));
});

If you need further guidance, check out this helpful question:

How do I actually deploy an Angular 2 + Typescript + systemjs app?

Answer 3

Answer №2

If you want TypeScript to concatenate and output everything to a single file, you can specify the outFile option in your tsconfig.json. After that, you just need to reference this file in your index.html.

In your gulpfile.js:

function buildApp() {
return gulp.src('./app/app.ts')
    .pipe(tsc({
        typescript: require('typescript'), // My package.json has "typescript": "~1.8.0-dev.20151128"
        target: 'ES5',
        module: 'system',
        experimentalDecorators: true,
        emitDecoratorMetadata: true
        outFile: 'app.js'
    }))
    // The resulting pipe will only contain app.js
    .pipe(gulp.dest('./dist'));
}

Then, in your index.html:

<script src="./dist/scripts/app.js"></script>

For more information, check out How to combine multiple transpiled JS files into one bundle.

Answer 4

If you want TypeScript to concatenate and output everything to a single file, you can specify the outFile option in your tsconfig.json. After that, you just need to reference this file in your index.html.

In your gulpfile.js:

function buildApp() {
return gulp.src('./app/app.ts')
    .pipe(tsc({
        typescript: require('typescript'), // My package.json has "typescript": "~1.8.0-dev.20151128"
        target: 'ES5',
        module: 'system',
        experimentalDecorators: true,
        emitDecoratorMetadata: true
        outFile: 'app.js'
    }))
    // The resulting pipe will only contain app.js
    .pipe(gulp.dest('./dist'));
}

Then, in your index.html:

<script src="./dist/scripts/app.js"></script>

For more information, check out How to combine multiple transpiled JS files into one bundle.

I'm working on an Angular2 project and I'm looking for a way to concatenate all my JavaScript files that were created from TypeScript in Gulp and then include them in my index

Answer №1

Answer №2

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