jQuery 如何在页面加载时获取下拉列表的值
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How do I get the value of drop down list on page load
提问by bikey77
Using jQuery, how can I get the selected item's value in a select when the page loads? I can do it onChange etc but cant figure out the way on page load.
使用 jQuery,如何在页面加载时在选择中获取所选项目的值?我可以做 onChange 等,但无法弄清楚页面加载的方式。
Here's my code:
这是我的代码:
<select name="symb" id="symb">
<option value="1#10#6">Basic Personal</option>
<option selected="selected" value="2#20#6">Basic Family</option>
<option value="7#90#12">Advanced Personal</option>
<option value="8#120#12">Advanced Family</option>
<option value="9#130#12">Optimum Personal</option>
<option value="10#170#12">Optimum Family</option>
</select>
This is the script I'm using for getting the option value onchange:
这是我用于获取 onchange 选项值的脚本:
$(document).ready(function() {
$("#symb").change(function() {
var val = $(this).symbCost(0);
})
$.fn.symbCost = function(pos) {
var total = parseInt($("option:selected").val().split('#')[pos]);
return total;
}
});
回答by slash197
$(document).ready(function() {
alert($("#symb").val());
});
回答by Tats_innit
Working Demohttp://jsfiddle.net/YXbDd/3/orhttp://jsfiddle.net/YXbDd/4/
工作演示http://jsfiddle.net/YXbDd/3/或http://jsfiddle.net/YXbDd/4/
API: http://api.jquery.com/ready/> Specify a function to execute when the DOM is fully
loaded.
API:http: //api.jquery.com/ready/ 已> Specify a function to execute when the DOM is fully
加载。
I am not sure what pos
context is in your case but this should do the stick.
我不确定pos
您的情况是什么背景,但这应该可以解决问题。
$("#symb").val().split('#')[0]
$("#symb").val().split('#')[0]
Rest as demo and code, hope it helps,
作为演示和代码休息,希望它有帮助,
code
代码
$(document).ready(function() {
alert("when the page load ==> " + $("#symb").val().split('#')[0]);
$("#symb").change(function() {
var val = $(this).symbCost(0);
})
$.fn.symbCost = function(pos) {
var total = parseInt($("option:selected").val().split('#')[pos]);
alert(total);
return total;
}
});?
or
或者
$(document).ready(function() {
alert("when the page load ==> " + $("#symb option:selected").val().split('#')[0]);
$("#symb").change(function() {
var val = $(this).symbCost(0);
})
$.fn.symbCost = function(pos) {
var total = parseInt($("option:selected").val().split('#')[pos]);
alert(total);
return total;
}
});?
回答by nilesh
$(document).ready(function() {
alert($("#dropdownid").val());
});
回答by feralou
The best solution and siple:
最好的解决方案和简单的:
$(document).ready(function() {
$.fn.symbCost = function(pos) {
var total = parseInt($(this).val().split('#')[pos]);
return total;
}
$("#symb").change(function() {
var val = $(this).symbCost(0);
}).triggerHandler('change');
});
});
Or this
或这个
$(document).ready(function() {
$.fn.symbCost = function(pos) {
var total = parseInt($(this).val().split('#')[pos]);
return total;
}
$("#symb").change(function() {
var val = $(this).symbCost(0);
}).symbCost(0);
});
});