javascript - JQuery - Why does Trigger method call it three times?

Question

$(document).ready(function(){
    $("input").select(function(){
        $("input").after(" Text marked!");
    });
    $("button").click(function(){
        $("input").trigger("select");
    });
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>


<input type="text" value="Hello World"><br><br>

<button>Trigger the select event for the input field</button>

Answer 1

JQuery - Why does Trigger method call it three times?

Appear to be called twice at click event of button ; at

$("input").trigger("select");

and default handler for select event

$("input").select(function(){
    $("input").after(" Text marked!");
});

To call once at click of button , or user selection at input field , try checking event.isTrigger to determine if event called by .trigger()

$(document).ready(function(){
    $("input").select(function(e){
      if (!e.isTrigger)
        $("input").after(" Text marked!");
    });
    $("button").click(function(){
        $("input").trigger("select");
    });
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js">
</script>
<input />
<button>click</button>