Each from time to time I find out about a JavaScript property that I want I had identified about years earlier — valueAsNumber is considered one of them. The valueAsNumber gives the worth of an enter[type=number] as a Quantity kind, as a substitute of the normal string illustration if you get the worth:
/* Assuming an <enter kind="quantity" worth="1.234" /> */ // BAD: Get the worth and convert the quantity enter.worth // "1.234" const numberValue = parseFloat(enter.worth, 10); // GOOD: Use valueAsNumber enter.valueAsNumber // 1.234
This property permits us to keep away from parseInt/parseFloat, however one gotcha with valueAsNumber is that it’s going to return NaN if the enter is empty.
Thanks to Steve Sewell for making me conscious of valueAsNumber!
PSA: quantity inputs have a `.valueAsNumber` property that you could be discover helpful pic.twitter.com/1QwdAW16CC
— Steve Sewell (@Steve8708) March 31, 2022
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