one enter keypress runs event handler twice

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Why does one enter keypress runs (inside) through this code twice?
I've tried keypress, keydown and also event.preventdefault() to no avail.

JavaScript

    $(document).keydown(function (e) {
        if (e.which == 13) {
           alert("0")
            var focado = document.getElementById(document.activeElement.id), fim = focado.id.substring(1),
                inicio = focado.id.substring(0, 1),
                fimseg = fim,
                anterior = inicio + (fim - 1),
                
            alert("1")
            
        
            alert("focado " + focado.id + " fim " + fim + " inicio " + inicio + " fimseg " + fimseg + " anterior " + anterior);
        }
});

and only after giving this 3 messages twice it would continue to the remaining code I trimmed and isn't shown.

thanks

Posted 29-Oct-15 8:31am

Nosfa

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Comments

Sergey Alexandrovich Kryukov 29-Oct-15 15:08pm

Use some JavaScript debugger and you will see. And better don't write code in so hard-coded (ad-hoc) style.
—SA

Mohibur Rashid 29-Oct-15 20:12pm

There is a chance that you have called $(document).keydown(...) twice .

Open your firefox or chrome browser, (there is other but, I don't care that much), and write the following code

i=1;
$(document).keydown(function(e){console.log("here"+i);i++;})
$(document).keydown(function(e){console.log("here"+i);i++;})

and then perform your test and see what happened. you will find your reason

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**Debojyoti Saha** · Answer 1 · 2015-10-29T18:57:00

Solution 1

Please use the code
It can helps you to prevent immediate twice execution of the event

JavaScript

$(document).keydown(function (e) {
  e.stopImmediatePropagation();
  ......
  ......

Keeps the rest of the handlers from being executed and prevents the event from bubbling up the DOM tree.

Posted 29-Oct-15 18:57pm

Debojyoti Saha