how to use the extendown function from the underscore library in javascript

The _.extendOwn() function in Underscore.js is a utility function that is used to copy all enumerable properties of one or more source objects to a destination object, and returns the destination object.

To use _.extendOwn(), you need to load the Underscore.js library in your HTML file, like this:

<script src="underscore.js"></script>
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Or you can install it via NPM by running:

index.tsx
npm install underscore
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The basic syntax for using _.extendOwn() is as follows:

index.tsx
_.extendOwn(destination, *sources)
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Here is an example of usage:

index.tsx
const destination = {
  name: 'John',
  age: 30
};

const source = {
  age: 35,
  occupation: 'Developer'
};

_.extendOwn(destination, source);

// Output: { name: 'John', age: 35, occupation: 'Developer' }
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In this example, the _.extendOwn() function copies the age property from the source object to the destination object, and adds the new occupation property to the destination object. The resulting object is { name: 'John', age: 35, occupation: 'Developer' }