How do you use javascript libraries in typescript file

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Using JavaScript Libraries in TypeScript Files

Using JavaScript libraries in TypeScript files is a common task for developers. TypeScript is a superset of JavaScript, so any library written in JavaScript can be used in TypeScript without any issues.

Step 1: Install the Library

The first step is to install the library you want to use. This can be done using a package manager such as npm or yarn. For example, if you wanted to install the popular Lodash library, you would run the following command:

npm install lodash

Step 2: Import the Library

Once the library is installed, you can import it into your TypeScript file. This is done using the import keyword. For example, to import Lodash into a TypeScript file, you would use the following code:

import * as _ from 'lodash';

Step 3: Use the Library

Once the library is imported, you can use it in your TypeScript code. For example, if you wanted to use the Lodash map function, you would use the following code:

const numbers = [1, 2, 3, 4, 5];
const doubledNumbers = _.map(numbers, (num) => num * 2);

In this example, the map function is used to double each number in the numbers array.

Conclusion

Using JavaScript libraries in TypeScript files is a straightforward process. All you need to do is install the library, import it into your TypeScript file, and then use it in your code.