Run function in input if it is empty? [duplicate]

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 — Justinas
– Justinas, Commented Feb 28, 2019 at 9:56
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
– briosheje, Commented Feb 28, 2019 at 9:57

Mihai Matei · Accepted Answer · 2019-02-28 09:57:32Z

0

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

answered Feb 28, 2019 at 9:57

Mihai Matei

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Comments

ellipsis · Accepted Answer · 2019-02-28 09:58:02Z

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, 2019 at 9:58

ellipsis

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