Sometimes, we want to remove undefined values from an array with JavaScript.
In this article, we’ll look at how to remove undefined values from an array with JavaScript.
How to remove undefined values from an array with JavaScript?
To remove undefined values from an array with JavaScript, we can use the array filter method.
For instance, we write
let data = [42, 21, undefined, 50, 40, undefined, 9];
data = data.filter(Number);
to call data.filter with the Number function to return a new array without the undefined values in data.
Then we assign the new array back to data.
Conclusion
To remove undefined values from an array with JavaScript, we can use the array filter method.
