Transforming AngularJS 2.0 code into ES6 syntax

Question

Transforming AngularJS 2.0 code into ES6 syntax

Successfully implemented the AngularJS 2.0 5 Minute Quickstart in my IntelliJ IDEA 14.1.4 following a helpful Stackoverflow Answer on AngularJS 2.0 TypeScript Intellij idea (or webstorm) - ES6 import syntax.

However, it seems to focus on compiling TypeScript to EcmaScript 5.

Curious if it's possible to compile AngularJS 2.0 Typescript to EcmaScript 6.

Issue 1: When I change the compiler to target ES6 ...

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

An error occurs with the TypeScript compiler:

Error: TS1204: Cannot compile modules into 'commonjs', 'amd', 'system', or 'umd' 
when targeting 'ES6' or higher.

Solving it involves removing the --module "amd" option from the compiler.

Leads to the question: without amd, what module format does ES6 use?

Issue 2:

After tweaking the compiler options as follows:

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

Errors start appearing regarding:

Error TS2300: Duplicate identifier 'Promise'

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

Has anyone encountered this issue before? Seems related to the AngularJS 2.0 Quickstart and global installation of ES-6 Promise, but struggling to find a solution.

Your assistance is greatly appreciated.

angular typescript ecmascript-6

Answer 1

Answer №1

What module format does ES6 use if amd is not specified?

When targeting es6, only the system module format is supposed to be allowed. The fact that amd worked is actually a bug.

Encountered duplicate identifier 'Promise'

When targeting es6, lib.d.ts changes to lib.es6.d.ts (this file), which includes a definition for Promise.

Recommended fix:

Compile with --nolib and include lib.d.ts in your project

Learn more about lib.d.ts http://basarat.gitbooks.io/typescript/content/docs/types/lib.d.ts.html

Answer 2

What module format does ES6 use if amd is not specified?

When targeting es6, only the system module format is supposed to be allowed. The fact that amd worked is actually a bug.

Encountered duplicate identifier 'Promise'

When targeting es6, lib.d.ts changes to lib.es6.d.ts (this file), which includes a definition for Promise.

Recommended fix:

Compile with --nolib and include lib.d.ts in your project

Learn more about lib.d.ts http://basarat.gitbooks.io/typescript/content/docs/types/lib.d.ts.html

Answer 3

Answer №2

After troubleshooting, I have successfully resolved the obstacles hindering me from compiling the AngularJS 2.0 Quickstart into EcmaScript 6:

Solution:

It was noted that ES6 does not support amd. Despite trying to specify the compiler flag as --module="system", it still resulted in an error:

Error: TS1204: Cannot compile modules into 'commonjs', 'amd', 'system', or 'umd' when targeting 'ES6' or higher.

To address this issue, it is crucial to NOT specify any module.

Updated TypeScript compiler options:

--experimentalDecorators --target "es6"

The execution of
```
tsd install angular2 es6-promise rx rx-lite
```
retrieves ES6 promise accordingly. However, a conflict arises with the TypeScript 1.5.3 including a TypeScript Definition file named lib.es6.d.ts.

This includes a Promise definition which clashes with the one obtained via the tsd command.

I proceeded to delete the es6-promise directory from my Angular2 project's typings folder (generated from running tsd).

(a workaround): Removing the line within the angular2.d.ts file:
```
///reference path=<"../es6-promise/es6-promise.d.ts"/>
```

The rationale behind this action was that the

AngularJS 2.0 TypeScript Type Definition

expects the ES6 Promise at a peer level. This conflicted with the version of TypeScript compiler being utilized, specifically TypeScript 1.5.3, already containing the ES6 Promise.

Answer 4

After troubleshooting, I have successfully resolved the obstacles hindering me from compiling the AngularJS 2.0 Quickstart into EcmaScript 6:

Solution:

It was noted that ES6 does not support amd. Despite trying to specify the compiler flag as --module="system", it still resulted in an error:

Error: TS1204: Cannot compile modules into 'commonjs', 'amd', 'system', or 'umd' when targeting 'ES6' or higher.

To address this issue, it is crucial to NOT specify any module.

Updated TypeScript compiler options:

--experimentalDecorators --target "es6"

The execution of
```
tsd install angular2 es6-promise rx rx-lite
```
retrieves ES6 promise accordingly. However, a conflict arises with the TypeScript 1.5.3 including a TypeScript Definition file named lib.es6.d.ts.

This includes a Promise definition which clashes with the one obtained via the tsd command.

I proceeded to delete the es6-promise directory from my Angular2 project's typings folder (generated from running tsd).

(a workaround): Removing the line within the angular2.d.ts file:
```
///reference path=<"../es6-promise/es6-promise.d.ts"/>
```

The rationale behind this action was that the

AngularJS 2.0 TypeScript Type Definition

expects the ES6 Promise at a peer level. This conflicted with the version of TypeScript compiler being utilized, specifically TypeScript 1.5.3, already containing the ES6 Promise.

Answer 5

Answer №3

After Philip's Angular2 tutorial was updated, the use of es6-promise was removed, but I encountered an error during the transpilation process to es6.

The solution is to exclude browser typings when working with es6. This can be achieved by adding

"typings/browser", "typings/browser.d.ts"

to the exclude option in tsconfig.js.

If you are transpiling to es6, make sure to include:

{
  "compilerOptions": {
    "target": "es6",
    "module": "system",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false
  },
  "exclude": [
    "node_modules",
    "typings/browser",
    "typings/browser.d.ts",
    "typings/main",
    "typings/main.d.ts"
  ]
}

For those transpiling to es5, use the following configuration:

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

Answer 6

After Philip's Angular2 tutorial was updated, the use of es6-promise was removed, but I encountered an error during the transpilation process to es6.

The solution is to exclude browser typings when working with es6. This can be achieved by adding

"typings/browser", "typings/browser.d.ts"

to the exclude option in tsconfig.js.

If you are transpiling to es6, make sure to include:

{
  "compilerOptions": {
    "target": "es6",
    "module": "system",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false
  },
  "exclude": [
    "node_modules",
    "typings/browser",
    "typings/browser.d.ts",
    "typings/main",
    "typings/main.d.ts"
  ]
}

For those transpiling to es5, use the following configuration:

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

Answer 7

Answer №4

I spent a significant amount of time struggling with this issue. Despite trying all the information available, I was unable to find a solution. I had been referencing typings in my boot file.

/// <reference path="../../typings/index.d.ts" />

The structure of my typings folder looked like this:

typings
-- globals
---- es6-collections
---- es6-promise
---- node

I even went as far as removing the @type node module entirely and experimenting with different 'excludes' and 'types' configurations in the tsconfig.json file, but nothing seemed to work.

After much trial and error, I discovered that including only the 'node' index.d.ts file from the typings folder solved the problem.

Therefore, adding

/// <reference path="../../typings/globals/node/index.d.ts" />

in my Angular 2 boot file resolved the issue for me.

Answer 8

I spent a significant amount of time struggling with this issue. Despite trying all the information available, I was unable to find a solution. I had been referencing typings in my boot file.

/// <reference path="../../typings/index.d.ts" />

The structure of my typings folder looked like this:

typings
-- globals
---- es6-collections
---- es6-promise
---- node

I even went as far as removing the @type node module entirely and experimenting with different 'excludes' and 'types' configurations in the tsconfig.json file, but nothing seemed to work.

After much trial and error, I discovered that including only the 'node' index.d.ts file from the typings folder solved the problem.

Therefore, adding

/// <reference path="../../typings/globals/node/index.d.ts" />

in my Angular 2 boot file resolved the issue for me.

Transforming AngularJS 2.0 code into ES6 syntax

Answer №1

Answer №2

Answer №3

Answer №4

Similar questions

Navigating through the key type within a mapped structure

Dynamic labeling of breadcrumbs in Angular is the way to go!

Angular 2: Retrieve current currency rates based on your location

Encountering memory leaks and displaying repetitive data due to having two distinct observables connected to the same Firestore

NGRX reducer avoids generating errors due to incorrect assignments

Tips for implementing a filtering function within an array of objects

What is the best way to connect an event in Angular 2?

The system detected an Image with the source "/images/logo.png" as the primary element contributing to Largest Contentful Paint (LCP)

I'm curious if there is a method to implement Angular Datatables that includes a filter for every column in a more streamlined and efficient manner?

What could be causing Angular to mistakenly refer to a clearly defined object as undefined?

What is the most effective method for incorporating JWT authentication in Angular (Client Side) without relying on Local Storage?

What is the best way to verify a numerical input in a React component?

Mismatched URLSearchParam type {property: value} does not match with undefined and Argument Type {property: value} cannot be assigned to {property: value}

Creating a Build-Free Workflow in a TypeScript Monorepo

Extracting data from an array using Angular

What is the best way to search for specific data in a MongoDB database?

Efficiently Combining Objects with Rxjs

Creating an extended class with mandatory properties

Declaring a sophisticated array as a property within another property in Typescript

Leveraging import and export functionality in TypeScript while utilizing RequireJS as a dependency