Getting the value of an input element as a number without parseInt

Every once in a while, you come across something and you think, how did I not know this earlier? valueAsNumber is that thing for me. Whenever we need the value of an HTMLInputElement, we go to e.target.value. But getting the value of an input element as a number can be done without parseInt or parsing it.

HTMLInputElement.valueAsNumber is an attribute that returns a numeric value of the input field and it returns NaN if the value cannot be converted.

- Advertisement -
/*
 Assuming an <input type="number" value="3.14" />
*/

console.log(input.valueAsNumber) // 3.14

Some things to note:

  • This only works for inputs with type="number"
  • This can also be used as a setter. So input.valueAsNumber = 45 is valid too.
  • There also is a HTMLInputElement.valueAsDate to get the date from an input with type="date"
  • And there is a setter for date inputs too: input.valueAsNumber = new Date()

Recent Articles

How to sort a Set in JavaScript

ES6 introduced the set data structure in JavaScript. But sets are not ordered abstract data structures. So there is no .sort() property...

Debugging CSS scroll using one simple style

I have been doing a lot of complicated front-end work off lately and that always brings me back to the class conundrum...

CSS :has a parent selector now

CSS now includes a :has selector that allows us to apply styles on the basis of what is happening inside an element....

How to fix “invalid active developer path” after MacOS update

If you are here, then you are getting an "invalid active developer path" error on running commands in the terminal after a...

Getting the value of an input element as a number without parseInt

Every once in a while, you come across something and you think, how did I not know this earlier? valueAsNumber is that thing...

Related Stories

Leave A Reply

Please enter your comment!
Please enter your name here

Hi there! Want some more knowledge?

Think that the knowledge shared is helpful? You might want to give our mailing list a try. We'll send you 2-4 emails a month, right when new posts come out.

Hi there! Want some more knowledge?

Think that the knowledge shared is helpful? You might want to give our mailing list a try. We'll send you 2-4 emails a month, right when new posts come out.