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

To use the keys function from Underscore library, the library first needs to be included in the project. This can be done by including a reference to the Underscore library in the HTML file, like so:

<script src="underscore.js"></script>
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Once the library is included, the keys function can be used to retrieve all the keys of an object as an array. Here is an example:

index.tsx
// Define an object 
const example_object = {a: 1, b: 2, c: 3};

// Use the `keys` function to get an array of all the keys of the object
const keys = _.keys(example_object);

console.log(keys);
// Output: ["a", "b", "c"]
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In this example, we defined an object called example_object, which has three properties. We then used the keys function from the Underscore library to retrieve an array of all the keys of the object. The resulting array, keys, contains the values ["a", "b", "c"].