Disable spaces on input not working for devices

Question

I'm trying to disable spaces on keydown, is working fine on desktop browsers but not working on devices like android.

In Javascript I use next script:

function noSpaces(e) {
    return e.which === 32 ? false : true;
}

And on HTML I use:

<input type="text" onkeydown="return noSpaces(event)" />

Any idea why is not working on devices?

`? false : true` this is unneeded. Try `return e.which !== 32;` instead — evolutionxbox, Jul 26 '21 at 17:10
Does this answer your question? [Why does returning false in the keydown callback does not stop the button click event?](https://stackoverflow.com/questions/1639338/why-does-returning-false-in-the-keydown-callback-does-not-stop-the-button-click) — evolutionxbox, Jul 26 '21 at 17:12
@evolutionxbox thanks for the simplification, but anyway is not working on devices. — El Tito Barte, Jul 26 '21 at 17:13
Likely to help | https://stackoverflow.com/questions/17139039/keycode-is-always-zero-in-chrome-for-android — mordad, Jul 26 '21 at 17:13
@AmirrezaAmini yes, I mean, I know is not physical keyboard, is any different script to do it? — El Tito Barte, Jul 26 '21 at 17:20
No, it's not possible as you think and maybe it is but I don't have any idea how. Maybe there is another library for it in JS? search for it. — Amini, Jul 26 '21 at 17:26

score 1 · Accepted Answer · answered Jul 26 '21 at 17:19

1

Virtual keyboard on mobile devices may give an unexpected value for Event.which, in many cases it will return value 229 (reference caniuse keyboardevent-which).
Event.which is also deprecated. So what you should do is to use the more standard Event.key. Note that Event.key isn't based on code-number (like 32, 33, 34,...), you must use correct value (see more at MDN KeyboardEvent.key).
So your example should be corrected into something like this: e.key === " "

answered Jul 26 '21 at 17:19

code đờ

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I try this, still working on desktop, but not on device. – El Tito Barte Jul 26 '21 at 17:23
I try it in different device browser and is working fine, so I suppose that is Samsung Browser issue. Thanks – El Tito Barte Jul 26 '21 at 17:25

Disable spaces on input not working for devices

1 Answers1