Run function in input if it is empty?

Question

Is there anyway I can check if an input is empty using javascript and then run a function? I'd like it to be in the input itself if possible.

There is onChange so is there an ifEmpty lol?

`if (myElement.value == '') {runFunction();}`[JavaScript validation for empty input field](https://stackoverflow.com/questions/3937513/javascript-validation-for-empty-input-field) — Justinas, Feb 28 '19 at 09:56
There is no `ifEmpty` attribute/event natively implemented, you need to take care of that by checking whether, on change, the value is effectively "empty" (define empty, anyway). Besides, can you please show what you've tried to accomplish the goal? — briosheje, Feb 28 '19 at 09:57

score 0 · Answer 1 · answered Feb 28 '19 at 09:57

0

<input onChange="this.value.trim().length > 0 && myFunction()" />

answered Feb 28 '19 at 09:57

Mihai Matei

score 0 · Answer 2 · answered Feb 28 '19 at 09:58

0

Try this

function a(e)
{
if(e.value=="")
return false;
else
console.log('there is a value')
}

<input value="" onclick="a(this)">

answered Feb 28 '19 at 09:58

ellipsis

2 Answers2