jquery operation select encyclopedia_jquery

Add option

Copy code The code is as follows:

$('#id') .append("Text");//Append an option
$('#id').prepend("Text"); //Insert an option for select

Remove option

Copy code The code is as follows:

$("#ID option").each(function(){
if($(this).val()= =111){
$(this).remove();
}
});

$("UPS GroundGet the selection value of the drop-down menu
$("#testSelect option:selected").text();
$("# testSelect").find('option:selected').text();
$("#testSelect").val();
Select the drop-down box according to the value of option
$('#testSelect ').val('111');

2, radio button:

Copy code The code is as follows:

$("input[@type=radio][@ checked]").val();//Get the value of the selected item of the radio button (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 the middle)
3, checkbox:
$("input[@type=checkbox ][@checked]").val();//Get the value of the first selected item in the checkbox
$("input[@type=checkbox][@checked]").each(function( ){//Since multiple check boxes are generally selected, you can output in a loop
alert($(this).val());
});

$("# chk1").attr("checked",'');//Unchecked
$("#chk2").attr("checked",true);// Checked
if($( "#chk1").attr('checked')==undefined){}//Determine whether it has been checked
Of course jquery's selector is powerful. There are many methods.

Copy code The code is as follows:

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jquery radio value, checkbox value, select value, radio selected, checkbox selected, select selected, and related to obtain the value of a group of radio selected items

Copy code The code is as follows:

varitem= $('input[@name=items][@checked]').val();

Get the text of the selected item

Copy code The code is as follows:

varitem= $("select[@name=items] option[@selected]").text();

The second element of the select drop-down box is the currently selected value

Copy code The code is as follows:

$('#select_id')[0].selectedIndex=1;

The second element of the radio radio selection group is the currently selected value

Copy code The code is as follows:

$('input[@name=items]').get(1).checked=true;

Get value:
Text box, text area:

Copy code The code is as follows:

$("#txt").attr("value");

Multiple selection box checkbox:

Copy code The code is as follows:

$("# checkbox_id").attr("value");

Radio group radio:

Copy code The code is as follows:

$("input [@type=radio][@checked]").val();

Drop-down box select:

Copy code The code is as follows:

$('#sel ').val();

Control form elements:
Text box, text area:

Copy code The code is as follows:

$("#txt").attr("value",'');//Clear the content
$("#txt").attr("value",'11');// Fill content

Multiple selection box checkbox:

Copy code The code is as follows:

$("# chk1").attr("checked",'');//Unchecked
$("#chk2").attr("checked",true);// Checked
if($( "#chk1").attr('checked')==undefined)//Determine whether it has been checked

Radio group radio:
$("input[@type=radio]").attr("checked",'2');//Set the item with value=2 as the currently selected item
Drop-down box select:

Copy code The code is as follows:

$("#sel"). attr("value",'-sel3');//Set the item with value=-sel3 as the currently selected item
$("1111 2222").appendTo("#sel")//Add the option
$("#sel").empty() of the drop-down box; // Clear the drop-down box

Get the value of a group of radio selected items

Copy code The code is as follows:

varitem= $('input[@name=items][@checked]').val();

Get the text of the selected item

Copy code The code is as follows:

varitem= $("select[@name=items] option[@selected]").text();

The second element of the select drop-down box is the currently selected value

Copy code The code is as follows:

$('#select_id')[0].selectedIndex=1;

The second element of the radio radio selection group is the currently selected value

Copy code The code is as follows:

$('input[@name=items]').get(1).checked=true;

Get value:
Text box, text area:

Copy code The code is as follows:

$("#txt").attr("value");

Multiple selection box checkbox:

Copy code The code is as follows:

$("# checkbox_id").attr("value");

Radio group radio:

Copy code The code is as follows:

$("input [@type=radio][@checked]").val();

Drop-down box select:

Copy code The code is as follows:

$('#sel ').val();

Control form elements:
Text box, text area:

Copy code The code is as follows:

$("#txt").attr("value",'');//Clear the content
$("#txt").attr("value",'11');// Fill content

Multiple selection box checkbox:

Copy code The code is as follows:

$("# chk1").attr("checked",'');//Unchecked
$("#chk2").attr("checked",true);// Checked
if($( "#chk1").attr('checked')==undefined)//Determine whether it has been checked

Radio group radio:

Copy code The code is as follows:

$("input [@type=radio]").attr("checked",'2');//Set the item with value=2 as the currently selected item

Drop-down box select:

Copy code The code is as follows:

$("#sel ").attr("value",'-sel3');//Set the item with value=-sel3 as the currently selected item
$("1111< ;option value='2'>2222").appendTo("#sel")//Add the option
$("#sel").empty() of the drop-down box;//Clear the drop-down box Box