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Groups > comp.lang.javascript > #16391

Re: event listener

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Am 2012-10-04 13:49, michal meinte:
 > Hello,
 > Could someone help me find problem with event handler on dynamically 
created input tag. here is code
 >
 > 	var bod = document.getElementById("body");

Is this smart? An element with id "body"?

 > 	var par = document.createElement("p");
 > 	bod.appendChild(par);
 > 	var txt =  document.createTextNode("text 1:");
 > 	par.appendChild(txt);
 > 	var inp = document.createElement("input");
 > 	par.appendChild(inp);
 > 	inp.addEventListener('change',alert("dfd"));
 >
 > Last line is most important here. I assumed that alert window is 
triggered ones text is changed in input field but NO this alert is 
triggered immediately after listener is added and after that don't work 
I mean don't rise even if text is changed in input field.
 > What is wrong, how to add listener to input field.


Correct:
inp.addEventListener("change", function() { window.alert("dfd"); });

In your case you the *return value* of the alert() call becomes the 
addEventListener() argument.


Gregor

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event listener michal <michal.otawa@gmail.com> - 2012-10-04 04:49 -0700
  Re: event listener Martin Honnen <mahotrash@yahoo.de> - 2012-10-04 14:03 +0200
    Re: event listener michal <michal.otawa@gmail.com> - 2012-10-04 05:22 -0700
  Re: event listener Gregor Kofler <usenet@gregorkofler.com> - 2012-10-04 14:07 +0200

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