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Creating Dynamic Mind Maps with Angular Diagram Components

Alka Vats
Alka Vats
Table of Contents

Mind maps are powerful tools for brainstorming, organizing thoughts, and visualizing complex ideas. With Angular, a popular web development framework, you can create dynamic and interactive mind maps using diagram components. In this blog post, we’ll explore how to build a mind map application using Angular and provide examples to get you started.

If you want to learn one more angular feature, you can refer here.


Before we dive into creating a mind map application, make sure we have the following prerequisites:

  1. Node.js and npm: Ensure we have Node.js and npm (Node Package Manager) installed on your system. You can download them from
  2. Angular CLI: Install the Angular CLI globally by running the following command:
npm install -g @angular/cli

Setting Up the Angular Project

Let’s create a new Angular project for our mind map application:

ng new mind-map-app

Now, navigate to the project directory:

cd mind-map-app

Installing Diagram Libraries

To create mind maps, we’ll need a diagram library. In this example, we’ll use the popular ngx-diagram library. Install it and its dependencies as follows:

npm install ngx-diagram-core ngx-diagram-theme-default

Building the Mind Map Component

Next, let’s create a mind map component where we’ll build our mind map. Generate a new component using the Angular CLI:

Now, open the mind-map.component.ts file and add the necessary imports:

import { Component } from '@angular/core';
import { DiagramItem, DiagramModel, DiagramService, ConnectorModel, ConnectorType } from 'ngx-diagram-core';

  selector: 'app-mind-map',
  templateUrl: './mind-map.component.html',
  styleUrls: ['./mind-map.component.css'],
export class MindMapComponent {
  constructor(private diagramService: DiagramService) {

  createMindMap() {
    const root = new DiagramItem({ id: 'root', text: 'Root' });

    const model = new DiagramModel();


In the code above, we import necessary modules from ngx-diagram-core, create a root node, and initialize a diagram model.

Adding the Mind Map Component to the App

To see our mind map in action, add the MindMapComponent to the app.component.html:

<div style="text-align:center">
    Welcome to Mind Map App!

Styling the Mind Map

Create a basic CSS file mind-map.component.css to style your mind map. For example:

:host {
  display: block;
  width: 100%;
  height: 100%;

:host ::ng-deep .diagram-node {
  background-color: #3498db;
  color: #fff;
  border: 2px solid #2980b9;
  border-radius: 5px;
  text-align: center;
  padding: 10px;

:host ::ng-deep .diagram-connector {
  background-color: #34495e;
  border: 2px solid #2c3e50;

Running the Application

Now, we can run your Angular application using the following command:

ng serve

Visit http://localhost:4200 in your web browser to see your mind map in action.

Expanding the Mind Map

To create a fully functional mind map application, we can extend it in various ways:

  1. Adding Nodes: Implement a feature to add new nodes to the mind map dynamically.
  2. Connecting Nodes: Allow users to connect nodes to create relationships and hierarchies.
  3. Custom Styling: Enhance the visual appeal of your mind map by customizing the styles of nodes and connectors.
  4. Data Persistence: Implement data storage and retrieval to save and load mind maps.
  5. Export/Import: Provide options to export and import mind maps in common formats (e.g., JSON, XML).
  6. Collaboration: Enable real-time collaboration among multiple users on the same mind map.


Creating a mind map application using Angular and diagram components can be a valuable project to enhance your Angular skills. With the ngx-diagram library, we can easily build interactive mind maps and expand the functionality to suit your specific needs. Whether for personal organization or collaborative brainstorming, a well-designed mind map application can be a powerful tool for visualizing ideas and information.

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Alka Vats

Alka Vats

Alka Vats is a Software Consultant at Nashtech. She is passionate about web development. She is recognized as a good team player, a dedicated and responsible professional, and a technology enthusiast. She is a quick learner & curious to learn new technologies. Her hobbies include reading books, watching movies, and traveling.

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