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) // 3.14Some things to note:
- This only works for inputs with
type="number" - This can also be used as a setter. So
input.valueAsNumber = 45is valid too. - There also is a
HTMLInputElement.valueAsDateto get the date from an input withtype="date" - And there is a setter for date inputs too:
input.valueAsNumber = new Date()
