alert after second option is selected using javascript and html
Question
Good day, I am a newbie using javascript . This is how the code works: Drop drown select/option(tan) populates the second option(action) assigned . My problem is after second option(action) is selected the alert doesn't show... Please kindly help me. thanks in advance
<html>
<head><title>wahaha</title>
<link href="styles.css" rel="stylesheet" type="text/css">
<meta charset="UTF-8">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script type="text/javascript" src="jquery-1.12.3.js"></script>
<script>
$(document).ready(function ()
{
$("#type").change
(function ()
{
var val = $(this).val();
if (val == "tan")
{
$("#size").html("<select id='m'><option value='test'>nope</option><option value='action'>action</option></select>");
if (val == "action")
{
window.alert(5 + 6);
}
else if (val == test)
{
window.alert(5 + 6);
}
else{ alert("sample code"); }
}
else if (val == "-- select one --")
{
$("#size").html("<option value='test'>disney</option><option value='test2'>disneyt</option>");
}
else if (val == "green")
{
$("#size").html("<option value='test'>olive</option><option value='test2'>mantis green</option><option value='test2'>jungle green</option><option value='test'>asparagus</option>");
}
else if (val == "blue")
{
$("#size").html("<option value='test'>azure</option><option value='test2'>cerulean</option>");
}
}
);
});
</script>
</head>
<body>
<form>
<select id="type">
<option value="-- select one --">-- select one -- </option>
<option value="tan">tan</option>
<option value="green">green</option>
<option value="blue">blue</option>
</select>
<select id="size">
<option value="">-SIZE -- </option>
<option value="">size </option>
</select>
<br><br>
</form>
</body>
</html>
3 answers
solution1
2 ACCPTED 2016-05-03 05:31:14
<html>
<head><title>wahaha</title>
<link href="styles.css" rel="stylesheet" type="text/css">
<meta charset="UTF-8">
<script src="https://code.jquery.com/jquery-2.2.3.min.js"></script>
<script>
$(document).ready(function(){
$("#type").on("change",function(){
// #type Select is selected
var val = $(this).val();
if(val == "tan")
$("#size").html("<option value='test'>nope</option><option value='action'>action</option>");
else if(val == "-- select one --")
$("#size").html("<option value='test'>disney</option><option value='test2'>disneyt</option>");
else if(val == "green")
$("#size").html("<option value='test'>olive</option><option value='test2'>mantis green</option><option value='test2'>jungle green</option><option value='test'>asparagus</option>");
else if(val == "blue")
$("#size").html("<option value='test'>azure</option><option value='test2'>cerulean</option>");
});
$("#size").change(function(){
// #size Select is selected
var val2 = $(this).val();
if(val2 == "action")
alert( 5 + 6 );
else if(val2 == "test")
alert("sample code");
});
});
</script>
</head>
<body>
<form>
<select id="type">
<option value="-- select one --">-- select one -- </option>
<option value="tan">tan</option>
<option value="green">green</option>
<option value="blue">blue</option>
</select>
<select id="size">
<option value="">-SIZE -- </option>
<option value="">size </option>
</select>
<br><br>
</form>
</body>
</html>
"action" value in #size select. So dont run. But it running now..
solution2
0 2016-05-03 05:29:50
Your issue is not because of any if error as suggested in the other answer .
Your issue is because the change function never triggers for the second drop down aka the one with the id #side .
What you need to do?
You need to add the click listener to listen to a subsequent change in the value of #size and then trigger an alert.
DEMO
Here is a demo of what you need to do.Feel free to add the conditions as per your requirements.The current condition works on selecting action.
solution3
0 2016-05-03 05:35:45
Please use alert() instead of window.alert().
alert(5 + 6);
Please also check below
else if (val == 'test') instead of else if (val == test)
This will resolve your problem.
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