Including a Javascript library (jsencrypt) in an Angular 2 application

Question

Including a Javascript library (jsencrypt) in an Angular 2 application

I have gone through countless tutorials on this particular issue, but unfortunately, I have not yet found a solution. Let me provide some context first. I am working on an Angular 2 application and I need to incorporate this JS library for encryption: https://github.com/travist/jsencrypt

Initially, I added the jsencrypt node module using the command: npm install --save jsencrypt. The installation was successful, and I could locate the jsencrypt module in my node_modules folder.

Following some guides, I created a src/typings.d.ts file with the line: declare module 'jsencrypt'; as suggested.

Subsequently, in my components.ts file, I imported it by adding this line: import * as JSEncrypt from 'jsencrypt';

I also attempted to include < script src="/node_modules/jsencrypt/bin/jsencrypt.js">< /script>

in my .html file.

Within the initialization of my .component file, I tried to declare a basic JSEncrypt object: var decrypt = new JSEncrypt();

However, upon doing so, the console threw the following error: TypeError: Object is not a constructor (evaluating 'new WEBPACK_MODULE_4_jsencrypt()')

This led me to believe that the jsencrypt module was not being recognized correctly.

Since I am relatively new to Angular and have only been working with it for a few days, I am still learning all the terminology and fundamental concepts associated with the structural elements of an Angular application. Any guidance or assistance would be highly appreciated.

I utilized this tutorial as a starting reference point:

javascript angular typescript import jsencrypt

Answer 1

Answer №1

My experience with utilizing the same procedure for incorporating any JavaScript module that I have previously required has always yielded successful results.

Create a new project by entering 'ng new project_name'
Move into the project directory by typing 'cd project_name'
Install the jsencrypt package by running 'npm install --save jsencrypt'

Following your instructions, you will now have a fully functional Angular application, with the jsencrypt package properly installed in the node_modules directory. To eliminate the TypeScript compilation messages, although not necessary for functionality:

In the src folder, establish a subfolder called @types and within it, create another directory matching the package name (e.g., jsencrypt). Inside this new folder, include an index.d.ts file like so:

application_root_folder/src/@types/jsencrypt/index.d.ts

The content of the index.d.ts file should solely declare the module as follows:

declare module 'jsencrypt';

To utilize the package, import it into any .ts file—such as my app.component.ts file—and begin using it:

import { Component } from '@angular/core';
import * as JsEncryptModule from 'jsencrypt';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    title = 'app';

    constructor() {
        var encrypt = new JsEncryptModule.JSEncrypt();
        console.log(encrypt);
    }
}

You can verify in your browser's console that the object contains all properties and methods provided by the module/package:

https://i.sstatic.net/IZeb6.png

I won't delve extensively into the specifics of the package's usage itself, as I'm unfamiliar with it and believe it isn't the focal point of the inquiry. I trust this information proves to be helpful!

Answer 2

My experience with utilizing the same procedure for incorporating any JavaScript module that I have previously required has always yielded successful results.

Create a new project by entering 'ng new project_name'
Move into the project directory by typing 'cd project_name'
Install the jsencrypt package by running 'npm install --save jsencrypt'

Following your instructions, you will now have a fully functional Angular application, with the jsencrypt package properly installed in the node_modules directory. To eliminate the TypeScript compilation messages, although not necessary for functionality:

In the src folder, establish a subfolder called @types and within it, create another directory matching the package name (e.g., jsencrypt). Inside this new folder, include an index.d.ts file like so:

application_root_folder/src/@types/jsencrypt/index.d.ts

The content of the index.d.ts file should solely declare the module as follows:

declare module 'jsencrypt';

To utilize the package, import it into any .ts file—such as my app.component.ts file—and begin using it:

import { Component } from '@angular/core';
import * as JsEncryptModule from 'jsencrypt';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    title = 'app';

    constructor() {
        var encrypt = new JsEncryptModule.JSEncrypt();
        console.log(encrypt);
    }
}

You can verify in your browser's console that the object contains all properties and methods provided by the module/package:

https://i.sstatic.net/IZeb6.png

I won't delve extensively into the specifics of the package's usage itself, as I'm unfamiliar with it and believe it isn't the focal point of the inquiry. I trust this information proves to be helpful!

Answer 3

Answer №2

When working with React using Create React App, you can open a file with a .d.ts extension by following https://i.sstatic.net/onq9V.png

Then, simply include the line declare module 'jsencrypt'; . https://i.sstatic.net/JkMzO.png

Answer 4

When working with React using Create React App, you can open a file with a .d.ts extension by following https://i.sstatic.net/onq9V.png

Then, simply include the line declare module 'jsencrypt'; . https://i.sstatic.net/JkMzO.png

Answer 5

Answer №3

Include encryption functionality

import EncryptionModule from 'encryption-module/encrypt';

Initialize encryption module

private encryptor: EncryptionModule;

Configure public key

  private setupEncryption(): void {
    this.publicKey = this.storage.getItem('publicKey');

    if (this.publicKey) {
      this.encryptor = new EncryptionModule();
      this.encryptor.setPublicKey(this.publicKey);
    }
  }

Answer 6

Include encryption functionality

import EncryptionModule from 'encryption-module/encrypt';

Initialize encryption module

private encryptor: EncryptionModule;

Configure public key

  private setupEncryption(): void {
    this.publicKey = this.storage.getItem('publicKey');

    if (this.publicKey) {
      this.encryptor = new EncryptionModule();
      this.encryptor.setPublicKey(this.publicKey);
    }
  }

Answer 7

Answer №4

const { JSEncrypt } = require('jsencrypt');

Give this a shot. It specifically imports the JSEncrypt class.

Answer 8

const { JSEncrypt } = require('jsencrypt');

Give this a shot. It specifically imports the JSEncrypt class.

Including a Javascript library (jsencrypt) in an Angular 2 application

Answer №1

Answer №2

Answer №3

Answer №4

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