How To Call Javascript Functions From Typescript In Angular 5

Have you ever found yourself in a situation where you're working on an Angular 5 project and need to call a JavaScript function from your TypeScript code? Well, fear not! In this article, we'll walk you through the steps to achieve this seamlessly.

First things first, make sure you have a good understanding of the basics. TypeScript, being a superset of JavaScript, allows you to seamlessly integrate JavaScript code into your Angular project.

To call a JavaScript function from TypeScript in Angular 5, follow these steps:

1. Creating a JavaScript File:
Start by creating a JavaScript file that contains the function you want to call. Let's say you have a function named `myFunction()` that you want to access in your Angular component.

// my-functions.js
function myFunction() {
    console.log("Hello from JavaScript function");
}

2. Include the JavaScript File:
Next, include the JavaScript file in your Angular project. You can do this by adding a script tag in the `index.html` file.

<!-- index.html -->



   <title>My Angular App</title>

3. Calling the JavaScript Function:
Now, you can call the `myFunction()` from your TypeScript component file. Import the function from the global scope using the `declare` keyword.

// my-component.component.ts
declare function myFunction(): void;

@Component({
  templateUrl: './my-component.component.html'
})
export class MyComponent {
  constructor() {
    myFunction();
  }
}

By declaring the function using the `declare` keyword, TypeScript understands that the function exists at runtime, even though it might not have a TypeScript type definition.

4. Testing Your Setup:
To ensure everything works smoothly, run your Angular application and check the console for the output from the JavaScript function.

With these steps, you can easily call JavaScript functions from TypeScript in your Angular project. Remember to maintain consistency in your naming conventions and keep your code clean for better readability.

In conclusion, blending JavaScript functions with TypeScript in Angular 5 is a powerful technique that allows you to leverage existing JavaScript code seamlessly. By following these steps, you can incorporate JavaScript functionality into your Angular project effortlessly.

So, go ahead, give it a try, and enhance the functionality of your Angular application by calling JavaScript functions from TypeScript with ease!