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Angular 2 Import External Js File Into Component

One of the cool things about Angular 2 is its flexibility in working with external JavaScript files, which can greatly enhance your project's functionality. In this guide, we will walk you through the steps of importing an external JavaScript file into an Angular component.

When you have a specific JavaScript file that you want to use in your Angular 2 project, the first thing you need to do is to add the file to your project directory. Make sure the file is named appropriately and contains the necessary functions or objects you plan to use in your component. Once you have your JavaScript file ready, it's time to import it into your Angular component.

To import an external JavaScript file into an Angular 2 component, you need to follow these steps:

1. Open the component TypeScript file where you want to use the external JavaScript functionality.
2. At the top of your component file, add the following line to import the external JavaScript file:

Typescript

declare var : any;

Replace `` with the name you want to use to reference the functions or objects from the JavaScript file.

3. Next, inside your component class, create a method where you will call the functions or utilize the objects from the external JavaScript file.

4. To use the functions or objects from the external JavaScript file, simply call them using the `` you declared earlier.

Here's an example code snippet to illustrate the process:

Typescript

import { Component } from '@angular/core';

declare var externalLibrary: any;

@Component({
  selector: 'app-my-component',
  templateUrl: './my-component.component.html',
  styleUrls: ['./my-component.component.css']
})
export class MyComponent {

  constructor() {
    this.callExternalFunction();
  }

  callExternalFunction() {
    externalLibrary.myFunction();
  }

}

In the code snippet above, we declared a variable `externalLibrary` to store the functions or objects from the external JavaScript file. Inside the `MyComponent` class, we called a method `callExternalFunction` to execute the `myFunction` from the external JavaScript file.

Remember to ensure that the external JavaScript file is properly loaded in your project directory and its functions or objects are correctly referenced in your Angular component. Additionally, handling any dependencies or asynchronous loading of external scripts should also be considered to avoid any runtime errors.

By importing external JavaScript files into your Angular 2 components, you can take advantage of existing libraries or custom scripts to enhance the functionality of your project. Whether it's adding interactive elements, handling complex calculations, or integrating third-party services, incorporating external JavaScript can open up a world of possibilities for your Angular applications.

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