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

In order to use the compact function from the Underscore library in JavaScript, first you need to have Underscore installed and included in your project.

Then, you can use the _.compact() function to remove all falsy values from an array. This function returns a new array with all falsy values (i.e. null, undefined, NaN, false, 0, and "") removed.

Here's an example:

index.tsx
const arr = [0, 1, false, 2, '', 3]; // an array with falsy values

const newArr = _.compact(arr); // use the _.compact() function to remove falsy values

console.log(newArr); // Output: [1, 2, 3]
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In the code above, newArr will be a new array with all falsy values removed, so console.log(newArr) will output [1, 2, 3].