Detect when a specific <option> is selected with jQuery
I'd like jQuery to detect when the option with the id trade_buy_max
is selected.
$(document).ready(function() {
$("option#trade_buy_max").select(function () {
//do something
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<select name='type' id='type'>
<option id='trade_buy' value='1' selected='selected'>Buy</option>
<option id='trade_buy_max' value='1'>Buy max</option>
<option id='trade_sell' value='2'>Sell</option>
<option id='trade_sell_max' value='2'>Sell max</option>
</select>
I've tried the following, but it doesn't seem to work.
开发者_运维知识库Any ideas?
This works... Listen for the change event on the select box to fire and once it does then just pull the id attribute of the selected option.
$("#type").change(function(){
var id = $(this).find("option:selected").attr("id");
switch (id){
case "trade_buy_max":
// do something here
break;
}
});
What you need to do is add an onchange
handler to the select
:
$('#type').change(function(){
if($(this).val() == 2){
/* Do Something */
}
});
you can bind change
event on its select instead, then check if option selected
$("select#type").change(function () {
if( $("option#trade_buy_max:selected").length )
{
// do something here
}
});
$("option#trade_buy_max").change(function () {
opt = $(this).children("option:selected").attr('id');
if(opt == '#trade_sell_max'){
// do stuff
}
});
Untested, but that should work.
Use the change
event and get the id
attribute of the selected option:
$('#type').change(function () {
var selectedId = $('option:selected', this).attr('id');
if (selectedId == "trade_buy_max") {
// do something
}
});
Change .select to .change and put space before #
精彩评论