Guide to Utilizing the Dracula Graph Library in Angular

Question

Guide to Utilizing the Dracula Graph Library in Angular

Recently, I stumbled upon a JavaScript library that seems to be an ideal fit for my project. The library can be found at:
After installing the necessary libraries using npm - npm i raphael graphdracula - new folders were created in node_modules and the package.json file was updated as expected.
Now, when attempting to create a graph

var g = new Dracula.Graph();

an error is thrown by the compiler

Error: Cannot find name 'Dracula'

the main question now becomes: how do I properly import this library so TypeScript/Angular recognizes it? Unfortunately, my IDE does not offer much assistance in resolving this issue. Although I understand I need to import it in my module, I am unsure of what exactly needs to be imported.

import { ?? } from '??';

angular typescript npm graphdracula

Answer 1

Answer №1

Start by installing the necessary dependencies using npm

npm install --save graphdracula raphael

Next, I will convert the main example from the Dracula GitHub repository into TypeScript for an Angular project.

In your module.component.ts:

import * as dracula from 'graphdracula';

//[...]

const Graph = dracula.Graph;
const Renderer = dracula.Renderer.Raphael;
const Layout = dracula.Layout.Spring;

const graph = new Graph();

graph.addEdge('Banana', 'Apple');
graph.addEdge('Apple', 'Kiwi');
graph.addEdge('Apple', 'Dragonfruit');
graph.addEdge('Dragonfruit', 'Banana');
graph.addEdge('Kiwi', 'Banana');

const layout = new Layout(graph);
const renderer = new Renderer('#paper', graph, 400, 300);
renderer.draw();

In your module.component.html:

<div id='paper'>
</div>

Answer 2

Start by installing the necessary dependencies using npm

npm install --save graphdracula raphael

Next, I will convert the main example from the Dracula GitHub repository into TypeScript for an Angular project.

In your module.component.ts:

import * as dracula from 'graphdracula';

//[...]

const Graph = dracula.Graph;
const Renderer = dracula.Renderer.Raphael;
const Layout = dracula.Layout.Spring;

const graph = new Graph();

graph.addEdge('Banana', 'Apple');
graph.addEdge('Apple', 'Kiwi');
graph.addEdge('Apple', 'Dragonfruit');
graph.addEdge('Dragonfruit', 'Banana');
graph.addEdge('Kiwi', 'Banana');

const layout = new Layout(graph);
const renderer = new Renderer('#paper', graph, 400, 300);
renderer.draw();

In your module.component.html:

<div id='paper'>
</div>

Answer 3

Answer №2

If you're adding a JavaScript library without TypeScript support (meaning it doesn't have a type definition file *.d.ts), the correct way to import it is as follows:

import * as drac from 'graphdracula';

After importing it, you can then use it in your code like this:

var g = new drac.Dracula.Graph();

For more information on how to import third-party libraries, you can check out this resource:

Answer 4

If you're adding a JavaScript library without TypeScript support (meaning it doesn't have a type definition file *.d.ts), the correct way to import it is as follows:

import * as drac from 'graphdracula';

After importing it, you can then use it in your code like this:

var g = new drac.Dracula.Graph();

For more information on how to import third-party libraries, you can check out this resource:

Guide to Utilizing the Dracula Graph Library in Angular

Answer №1

Answer №2

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