keyPress event not firing in Android mobile

问题:

I am using backbone,marionette for my Application.I used same code for both desktop and mobile but keypress not working in mobile.I made a Jsfiddle for testing.

If you open this link in mobile event not firing,If you open in desktop it's firing.How can I resolve this.

can anyone help me.

Thanks.

回答1:

Chrome mobile doesn't support keypress events properly for now. There is a long standing bug for this:

https://code.google.com/p/chromium/issues/detail?id=118639

I believe it should be fixed in v38.

回答2:

I will suggest two events on input box.

This will work on desktop webbrowser.

1) onkeypress = return isNumberKey(event);

function isNumberKey(e)
{
    var evt = e || window.event;

    if(evt) 
    { 
        var charCode = evt.keyCode || evt.which; 
    }
    else 
    { 
        return true; 
    }

    if((charCode > 47 &&  charCode < 58) || charCode == 9 || charCode == 8 || charCode ==46 || charCode ==37 || charCode==39)
    { 
        return true; 
    }

    return false;
}

This will work for mobile

2) onkeyup="numberMobile(event);"

function numberMobile(e){
    e.target.value = e.target.value.replace(/[^\d]/g,'');
    return false;
}

Apply both event on the input box and it will work.Only drawback is,It make it slow.But for now we have to live with it.

There is one issue woth this solution.Left navigation is not working.I will update more appropriate solution soon.

回答3:

Tested on browserstack. Seems to be working to me. Here's a link to your gist:

http://www.browserstack.com/start#os=android&os_version=4.1&device=Samsung+Galaxy+S+III&zoom_to_fit=true&full_screen=true&url=http%3A%2F%2Fjsfiddle.net%2F33Snz%2F3%2Fembedded%2Fresult%2F&speed=1&start=true

Can you let know what specific andriod device and browser you testing in.

回答4:

Finally I found a problem,but it won't work in opera.Instead of writing the code for numeric fields.I just added an attribute type='number' to input field in html file.Now only numeric keypad is coming.So it satisfies my requirements.Here is the JsFiddle

html code:

<input type='number'/>

回答5:

It seems like keypress event has been deprecated (Refer to https://developer.mozilla.org/en-US/docs/Web/Events/keypress) and it is better to use keydown event now before all browser drop support on it.