JavaScript

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.

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

console.log(input.valueAsNumber) // 3.14

JavaScript

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()

Saransh Kataria

Born in Delhi, India, Saransh Kataria is the brain behind Wisdom Geek. Currently, Saransh is a software developer at a reputed firm in Austin, and he likes playing with new technologies to explore different possibilities. He holds an engineering degree in Computer Science. He also shares his passion for sharing knowledge as the community lead at Facebook Developer Circle Delhi, NCR which is a developer community in Delhi, India.