CODEWITHSUNDEEP
javascriptjqueryevent-handlingreturn
Devima
Devima

Reputation: 1566

Event handlers return true Javascript jQuery

First of all Hello to everyone, and sorry for my English.
Of course i did not understand completely the use of return within event handlers.
and i would like receive if possible some clarification in this regard.
In this document i have som nested elements Fiddle.
Each element has an event handler that colors the same element of red in bubbling phase.
My question is: why with jQuery i can stop event propagation with return false and whit javascript i can't do the same thing?
Any suggestions will be read with pleasure, thank you all.

<!DOCTYPE HTML>
<html>
<head>
<style>
.x{border-radius:250px;position: absolute;background-color:#CCC;border:1px solid #666;top: 24px; left: 24px;}
#el1{height: 200px;width: 200px;}
#el2{height: 150px;width: 150px;}
#el3{height: 100px;width: 100px;}
#el4{height: 50px;width: 50px;}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
    // first snippet i can't use return false
    function init(){
        var elements = document.getElementsByClassName('x')
        for(var i=0; i<elements.length; i++) {
          elements[i].addEventListener('click',function(e){
            this.style.backgroundColor='red'
            alert("clik")
             /*return false*/
          },false)
           /* return false*/
        }
    }
    document.addEventListener('DOMContentLoaded',init,false);
    // second snippet i can use return false
    /*$(document).ready(function(){
        $('div.x').click(function(){
            $(this).css({'background-color':'red'})
            alert("clik")
            return false
        })
    })*/
</script>
</head>
<body>
<div id="el1" class="x">
  <div id="el2" class="x">
    <div id="el3" class="x">
      <div id="el4" class="x"></div>
    </div>
  </div>
</div>
</body>
</html>

Upvotes: 1

Views: 2222

Answers (1)

user3058196
user3058196

Reputation: 11

<a href = "http://stackoverflow.com/" id = "a">http://stackoverflow.com/</a>

$("#a").click(function(){
    return false;
});

document.getElementById("a").onclick = function(){
    return false;
}

document.getElementById("a").addEventListener("click",function(e){
    e.stopPropagation();
    e.preventDefault();
    //the same function to "return false" in the above two method.
},false);

Upvotes: 1

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