The Text and Value selected by Select may both need to obtain their values in use, and even collect user needs. This article sorts out some common and practical operating skills. Interested friends can understand and consolidate their knowledge. , I hope this article is helpful to you
Syntax explanation:
1. $("#select_id").change(function(){//code...}); //Add an event to Select and trigger when one of them is selected
2. var checkText=$(" #select_id").find("option:selected").text(); //Get Select selected Text
3. var checkValue=$("#select_id").val(); //Get Select selected Value
4 . var checkIndex=$("#select_id ").get(0).selectedIndex; //Get the index value of Select
5. var maxIndex=$("#select_id option:last").attr("index"); //Get the largest index value of Select
jQuery sets the Text and Value of Select:
Syntax explanation:
1. $("#select_id ").get(0).selectedIndex=1; //Set the item with the Select index value to 1 to select
2. $("#select_id " ).val(4); // Set the value of Select to 4 and select
3. $("#select_id option[text='jQuery']").attr("selected", true); //Set Select The item whose Text value is jQuery is selected
jQuery adds/deletes the Option item of Select:
Syntax explanation:
1. $("#select_id").append("<option value='Value'>Text</option>"); //Add an Option to Select (drop down Item)
2. $("#select_id").prepend("<option value='0'>Please select</option>"); //Insert an Option for Select (first position)
3. $(" #select_id option:last").remove(); //Delete the largest index value in Select Option (last one)
4. $("#select_id option[index='0']").remove(); //Delete Option with index value 0 in Select (first)
5. $("#select_id option[value='3']").remove(); //Delete Option
5. $ with Value='3' in Select ("#select_id option[text='4']").remove(); //Delete the Option of Text='4' in Select
jquery radio value, checkbox value, select value, radio selected, checkbox selected, select selected, and related
Obtain the value of a set of radio selected items
var item = $('input[name=items][checked]' ).val();
Get the text of the selected item in select
var item = $("select[name=items] option[selected]").text();
The second element of the select drop-down box is the currently selected value
$( '#select_id')[0].selectedIndex = 1;
The second element of the radio single-selection group is the currently selected value
$('input[name=items]').get(1).checked = true;
Get the value:
Text box, text area: $("#txt").attr("value");
multi-select box checkbox: $("#checkbox_id").attr("value");
single-selection group radio: $("input [type=radio][checked]").val();
drop-down box select: $('#sel').val();
control form elements:
text box, text area: $("#txt").attr ("value",'');//Empty the content
$("#txt").attr("value",'11');//Fill the content
Checkbox: $("#chk1").attr("checked",'');//Do not tick
$("#chk2").attr("checked",true);//Check
if ($("#chk1").attr('checked')==undefined) //Determine whether the
radio group radio has been checked : $("input[type=radio]").attr("checked",' 2');//Set the item with value=2 as the currently selected item
drop-down box select: $("#sel").attr("value",'-sel3');//Set the item with value=-sel3 as Currently selected item
$("<option value='1'>1111</option><option value='2'>2222</option>").appendTo("#sel")//Add drop-down box option
$ ("#sel").empty();//Empty the drop-down box
---------------------------------- -------------------------------------------------- ----------------
//遍历option和添加、移除option
function changeShipMethod(shipping){
var len = $("select[name=ISHIPTYPE] option").length
if(shipping.value != "CA"){
$("select[name=ISHIPTYPE] option").each(function(){
if($(this).val() == 111){
$(this).remove();
}
});
}else{
$("<option value='111'>UPS Ground</option>").appendTo($("select[name=ISHIPTYPE]"));
}
}
//Get the selected value of the drop-down menu
$(#testSelect option:selected').text();
or $("#testSelect").find('option:selected').text();
or $("#testSelect ").val();
//If you have
a bad memory, you can bookmark it:
1. Drop-down box:
var cc1 = $(".formc select[name='country'] option[selected]").text(); / /Get the text of the selected item in the drop-down menu (note that there is a space in the middle)
var cc2 = $('.formc select[name="country"]').val(); //Get the value of the selected item in the drop-down menu
var cc3 = $('.formc select[name="country"]').attr("id"); //Get the ID attribute value of the selected item in the drop-down menu
$("#select").empty();// Clear the drop-down box//$("#select").html('');
$("<option value='1'>1111</option>").appendTo("#select")//Add a drop-down box Option
A little explanation:
1. select[name='country'] option[selected] means
the option element with the selected attribute in the select element with the name attribute and the attribute value is'country';
2. Single selection box:
$ ("input[@type=radio][@checked]").val(); //Get the value of the selected item in the radio box (note that there is no space in the middle)
$("input[@type=radio][@value =2]").attr("checked",'checked'); //Set the radio button value=2 to the selected state. (Note that there is no space in between)
3. Checkbox:
$("input[@type=checkbox][@checked]").val(); //Get the value of the first item selected in the checkbox
$("input[@type=checkbox ][@checked]").each(function() {//Because there are usually multiple checkboxes selected, you can cycle through the output
alert($(this).val());
});
$("# chk1").attr("checked",'');//Do not check
$("#chk2").attr("checked",true);// Check
if($("#chk1"). attr('checked')==undefined){} //Determine whether it has been ticked
当然jquery的选择器是强大的. 还有很多方法.
<script src="jquery-1.2.1.js" type="text/javascript"></script>
<script language="javascript" type="text/javascript">
$(document).ready(function(){
$("#selectTest").change(function()
{
//alert("Hello");
//alert($("#selectTest").attr("name"));
//$("a").attr("href","xx.html");
//window.location.href="xx.html";
//alert($("#selectTest").val());
alert($("#selectTest option[@selected]").text());
$("#selectTest").attr("value", "2");
});
});
</script>
<a href="#">aaass</a>
<!--Dropdown box-->
<select id="selectTest" name="selectTest">
<option value="1">11</option>
<option value="2">22</option>
<option value="3">33</option>
<option value="4">44</option>
<option value="5">55</option>
<option value="6">66</option>
</select>
jquery radio value, checkbox value, select value, radio selected, checkbox selected, select selected, and related to obtain a group of radio selected items The value
var item = $('input[@name=items][@checked]').val();
Get the text of the selected item
var item = $("select[@name=items] option[@selected] ").text();
The second element of the select drop-down box is the currently selected value
$('#select_id')[0].selectedIndex = 1;
The second element of the radio single-selection group is the currently selected value
$('input[@name=items] ').get(1).checked = true;
Get value:
text box, text area: $("#txt").attr("value");
multi-select box checkbox: $("#checkbox_id").attr("value");
single-select group radio: $ ("input[@type=radio][@checked]").val();
drop-down box select: $('#sel').val();
control form element:
text box, text area: $("# txt").attr("value",'');//Empty the content
$("#txt").attr("value",'11');// Fill in the content
checkbox: $("# chk1").attr("checked",'');//Do not check
$("#chk2").attr("checked",true);// Check
if($("#chk1"). attr('checked')==undefined) //Determine whether the
radio group radio has been checked : $("input[@type=radio]").attr("checked",'2');//Set value The item with =2 is the currently selected item.
Drop-down box select: $("#sel").attr("value",'-sel3');//Set the item with value=-sel3 as the currently selected item
$("<optionvalue='1'& gt;1111</option><optionvalue='2'>2222 </option& gt;").appendTo("#sel")//Add drop-down box option
$("#sel").empty();// Clear the drop-down box to
obtain the value of a selected radio item
var item = $('input[@name=items][@checked]').val();
Get the text of the selected item in select
var item = $("select[@name=items] option[@selected]").text();
The second element of the select drop-down box is the currently selected value
$('#select_id' )[0].selectedIndex = 1;
The second element of the radio single-selection group is the currently selected value
$('input[@name=items]').get(1).checked = true;
Get the value:
text box, Text area: $("#txt").attr("value");
multi-select box checkbox: $("#checkbox_id").attr("value");
single-select group radio: $("input[@type =radio][@checked]").val();
drop-down box select: $('#sel').val();
control form elements:
text box, text area: $("#txt").attr( "value",'');//Empty the content
$("#txt").attr("value",'11');// Fill in the content
Multi-select box checkbox: $("#chk1").attr("checked",'');//Do not tick
$ ( "# chk2") attr ( "checked", true);. // tick
(. $ ( "# chk1" ) attr ( 'checked') == undefined) if // check to determine whether
the radio Group radio: $("input[@type=radio]").attr("checked",'2');//Set the item with value=2 as the currently selected item
drop-down box select: $("#sel") .attr("value",'-sel3');//Set the item with value=-sel3 as the currently selected item
$("<option value='1'>1111</option><option value='2'> 2222</option>").appendTo("#sel")//Add the option of the drop-down box
$("#sel").empty();// Clear the drop-down box