Setting up d3 to function properly with Angular2 and TypeScript

Attempting to integrate the d3 library into an Angular 2 TypeScript project. I installed d3 using npm install d3 and the typings using typing install d3 --save, but when trying to start the local server for the project (

tsc && concurrently "npm 
run tsc:w" "npm run lite"
), I encountered the following error: 

typings/browser/definitions/d3/index.d.ts(3319,1): error TS2300: Duplicate identifier 'export='.
typings/browser/definitions/d3/index.d.ts(3323,1): error TS2300: Duplicate identifier 'export='.
typings/browser/definitions/d3/index.d.ts(3327,1): error TS2300: Duplicate identifier 'export='.
typings/modules/d3/index.d.ts(3319,1): error TS2300: Duplicate identifier 'export='.
typings/modules/d3/index.d.ts(3323,1): error TS2300: Duplicate identifier 'export='.
typings/modules/d3/index.d.ts(3327,1): error TS2300: Duplicate identifier 'export='.

Here are my configuration files:

typings.json: 

{
  "ambientDependencies": {
    "es6-shim": "github:DefinitelyTyped/DefinitelyTyped/es6-shim/es6-shim.d.ts#7de6c3dd94feaeb21f20054b9f30d5dabc5efabd",
    "jasmine": "github:DefinitelyTyped/DefinitelyTyped/jasmine/jasmine.d.ts#5c182b9af717f73146399c2485f70f1e2ac0ff2b",
    "gapi": "github:DefinitelyTyped/DefinitelyTyped/gapi.auth2/gapi.auth2.d.ts"
  },
  "dependencies": {
    "d3": "registry:npm/d3#3.0.0+20160211003958"
  }
}

package.json:

{
  "name": "session-explorer",
  "version": "1.0.0",
  "scripts": {
    "start": "tsc && concurrently \"npm run tsc:w\" \"npm run lite\" ",
    "lite": "lite-server",
    "postinstall": "typings install",
    "tsc": "tsc",
    "tsc:w": "tsc -w",
    "typings": "typings"
  },
  "license": "ISC",
  "dependencies": {
    "angular2": "2.0.0-beta.15",
    "systemjs": "0.19.26",
    "es6-shim": "^0.35.0",
    "reflect-metadata": "0.1.2",
    "rxjs": "5.0.0-beta.2",
    "zone.js": "0.6.10",
    "d3": "^3.0.0"
  },
  "devDependencies": {
    "concurrently": "^2.0.0",
    "lite-server": "^2.2.0",
    "typescript": "^1.8.10",
    "typings": "^0.7.12"
  }
}
d3.jstypescriptangular

Answer №1

To add typings for d3, follow these steps:

npm install d3 --save
npm install @types/d3 --save-dev

After that, you can use the following code to import d3:

import * as d3 from 'd3';

Answer №2

Welcome to the Latest Update for 2017

Setting Up

To add types for d3 v3, follow these steps:

npm install <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="a4c097e4978adc">[email protected]</a> --save
npm install @types/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="d4b0e794e7faac">[email protected]</a> --save-dev

If you are using the latest version of d3 (currently v4), here's how to install the types:

npm install d3 --save
npm install @types/d3 --save-dev

How to Use

import * as d3 from 'd3';

Answer №3

Since there is no predefined typings for D3 version 4, we need to create our own declaration file for d3 like this:

declare function d3(string: any): any;

Once the D3 node module is installed, we can import it into our file using:

var d3: any = require('d3');

Answer №4

It appears that the error message indicates a need to exclude the typings main.d.ts and main directories.

To address this, I recommend creating a tsconfig.json file in the same location as your typings.json file.

Your tsconfig.json should look like this:

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

You can refer to the angular documentation for more information on how the tsconfig.json file functions.

Answer №5

To easily bring in d3, you can use the following import statement:

import * as d3 from 'd3';

Ensure that the typings are correctly installed (which appears to be the case) and that the actual d3.js file is loaded, either through manual importing or some sort of preprocessing task involving the node_modules/d3 directory.

Double-check that you're not inadvertently importing d3.js in version 4.x, as this version introduces numerous changes that haven't been reflected in the TypeScript typings yet.

Answer №6

It seems like there is a lot of confusion regarding the versions of Typed d3 being discussed here.

As of 2017/12/09, the latest version available for Typed d3 is 4.12.0. There is no requirement to downgrade to version 3.x or make any additional declarations.

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