How to Integrate External JavaScript Functions into an Angular Project?

Integrating JavaScript Functions into Angular Projects

Question:

How can I incorporate a JavaScript script file and call a specific function within it, from within an Angular project?

Answer:

To integrate a JavaScript script file into Angular, you can refer to it in your angular-cli.json (or angular.json in Angular 6 ) file. This informs the Angular CLI where to locate the script during build time.

Add the following line to the "scripts" array:

"scripts": [
    "../path-to-script"
]

Next, you need to ensure TypeScript can recognize the external script. Create a typings.d.ts file (if it doesn't exist) in the src directory and add the following declaration:

declare var variableName: any;

In your Angular component or service, you can then import the script as follows:

import * as variable from 'variableName';

Using this technique, you can access the 'public' function (xyz()) from the abc.js script in your Angular code, allowing you to seamless integrate external JavaScript functionality.

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