How to Create a New Array with Default Values in JavaScript in One Line?

You can create a new array with default values in JavaScript in one line by using the Array.from() method and providing a default value. The following example creates an array with 5 elements, each with the default value of 0:

const array = Array.from({length: 5}, () => 0);
console.log(array); // Output: [0, 0, 0, 0, 0]

You can replace 0 with any value that you want to use as the default for each element in the array.

Alternatively, you can also use the Array.fill() method to achieve the same result:

const array = Array(5).fill(0);
console.log(array); // Output: [0, 0, 0, 0, 0]