HTML events changing input text, not incrementally

William Entriken 0
Viewed 35

I have an input field with type="number". After this value is changed the page will perform validation and if failed it will show a bunch of information to the visitor.

So this validation should only be done when:

  • Pasting something into the box
  • Typing in the box and then pressing tab to select another input
  • Typing in the box and then clicking outside the box
  • Pressing enter (which performs a click on the submit button)
  • Clicking increment and decrement buttons

And not when:

  • Typing a single digit (as the input is not complete)

Are there HTML events available for this requirement?

dom-events javascript html
3 Answers

Did you actually try the event .onchange / addEventListener('change',{}) or in your case, since you are asking for an html-inline-solution: input onchange="yourFunc()"? It sounds like that's pretty much what you want.

(.onchange won't trigger as long as you are just typing).

Here's a very simple demo to stress the behaviour of .onchange:

as you will see, it fulfills most of your needs:

Typing in the box and then pressing tab to select another input
Typing in the box and then clicking outside the box
Pressing enter (which performs a click on the submit button)
Clicking increment and decrement buttons

The only thing missing is triggering the event upon pasting smth in it, but the user can just press enter, click elsewhere, tab etc. to fire your function.

function fire(){
  console.log("changed");
}
<input type="number" onchange="fire()">
<button>a non-functional button to focus on</button>

Foxcode0

I think what you might be looking for is the onblur or focusout event. It fires when the element will be out of focus. Basically, the opposite of onfocus.

<input type="text" name="fname" id="fname" onblur="myFunction()">

You may want to use it in combination with other events (onclick) which you require for the submit button.

kush0 

let input = document.querySelector("input")

    input.onchange = function () {
        alert("changed")
    }
 <input type="number">

UmairFarooq0
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