jQuery获取Select选择的Text和Value(详细汇总)_jquery
语法解释:
1. $("#select_id").change(function(){//code...}); //为Select添加事件,当选择其中一项时触发
2. var checkText=$("#select_id").find("option:selected").text(); //获取Select选择的Text
3. var checkValue=$("#select_id").val(); //获取Select选择的Value
4. var checkIndex=$("#select_id ").get(0).selectedIndex; //获取Select选择的索引值
5. var maxIndex=$("#select_id option:last").attr("index"); //获取Select最大的索引值
jQuery设置Select选择的 Text和Value:
语法解释:
1. $("#select_id ").get(0).selectedIndex=1; //设置Select索引值为1的项选中
2. $("#select_id ").val(4); // 设置Select的Value值为4的项选中
3. $("#select_id option[text='jQuery']").attr("selected", true); //设置Select的Text值为jQuery的项选中
jQuery添加/删除Select的Option项:
语法解释:
1. $("#select_id").append(""); //为Select追加一个Option(下拉项)
2. $("#select_id").prepend(""); //为Select插入一个Option(第一个位置)
3. $("#select_id option:last").remove(); //删除Select中索引值最大Option(最后一个)
4. $("#select_id option[index='0']").remove(); //删除Select中索引值为0的Option(第一个)
5. $("#select_id option[value='3']").remove(); //删除Select中Value='3'的Option
5. $("#select_id option[text='4']").remove(); //删除Select中Text='4'的Option
jquery radio取值,checkbox取值,select取值,radio选中,checkbox选中,select选中,及其相关
获 取一组radio被选中项的值
var item = $('input[name=items][checked]').val();
获 取select被选中项的文本
var item = $("select[name=items] option[selected]").text();
select下拉框的第二个元素为当前选中值
$('#select_id')[0].selectedIndex = 1;
radio单选组的第二个元素为当前选中值
$('input[name=items]').get(1).checked = true;
获取值:
文本框,文本区域:$("#txt").attr("value");
多选框 checkbox:$("#checkbox_id").attr("value");
单选组radio: $("input[type=radio][checked]").val();
下拉框select: $('#sel').val();
控制表单元素:
文本框,文本区域:$("#txt").attr("value",'');//清空内容
$("#txt").attr("value",'11');//填充内容
多选框checkbox: $("#chk1").attr("checked",'');//不打勾
$("#chk2").attr("checked",true);//打勾
if($("#chk1").attr('checked')==undefined) //判断是否已经打勾
单选组 radio: $("input[type=radio]").attr("checked",'2');//设置value=2的项目为当前选中项
下拉框 select: $("#sel").attr("value",'-sel3');//设置value=-sel3的项目为当前选中项
$(" ").appendTo("#sel")//添加下拉框的option
$("#sel").empty();//清空下拉框
----------------------------------------------------------------------------------------------------
//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{
$("").appendTo($("select[name=ISHIPTYPE]"));
}
}
//取得下拉選單的選取值
$(#testSelect option:selected').text();
或$("#testSelect").find('option:selected').text();
或$("#testSelect").val();
//////////////////////////////////////////////////////////////////
记 性不好的可以收藏下:
1,下拉框:
var cc1 = $(".formc select[name='country'] option[selected]").text(); //得到下拉菜单的选中项的文本(注意中间有空格)
var cc2 = $('.formc select[name="country"]').val(); //得到下拉菜单的选中项的值
var cc3 = $('.formc select[name="country"]').attr("id"); //得到下拉菜单的选中项的ID属性值
$("#select").empty();//清空下拉框 //$("#select").html('');
$("").appendTo("#select")//添加下拉框的option
稍微解释一下:
1.select[name='country'] option[selected] 表示具有name 属性,
并 且该属性值为'country' 的select元素 里面的具有selected 属性的option 元素;
2,单选框:
$("input[@type=radio][@checked]").val(); //得到单选框的 选中项的值(注意中间没有空格)
$("input[@type=radio][@value=2]").attr("checked",'checked'); //设置单选框value=2的为选中状态.(注意中间没有空格)
3,复选框:
$("input[@type=checkbox][@checked]").val(); //得到复选框的选中的第一项的值
$("input[@type=checkbox][@checked]").each(function() { //由于复选框一般选中的是多个,所以可以循环输出
alert($(this).val());
});
$("#chk1").attr("checked",'');//不打勾
$("#chk2").attr("checked",true);// 打勾
if($("#chk1").attr('checked')==undefined){} //判断是否已经打勾
当然jquery的选择器是强大的. 还有很多方法.
aaass
jquery radio取值,checkbox取值,select取值,radio选中,checkbox选中,select选中,及其相关获取一组radio被选中 项的值
var item = $('input[@name=items][@checked]').val();
获取select被选 中项的文本
var item = $("select[@name=items] option[@selected]").text();
select 下拉框的第二个元素为当前选中值
$('#select_id')[0].selectedIndex = 1;
radio单选组的第二个 元素为当前选中值
$('input[@name=items]').get(1).checked = true;
获取值:
文本 框,文本区域:$("#txt").attr("value");
多选框 checkbox:$("#checkbox_id").attr("value");
单选组radio: $("input[@type=radio][@checked]").val();
下拉框select: $('#sel').val();
控 制表单元素:
文本框,文本区域:$("#txt").attr("value",'');//清空内容
$("#txt").attr("value",'11');// 填充内容
多选框checkbox: $("#chk1").attr("checked",'');//不打勾
$("#chk2").attr("checked",true);// 打勾
if($("#chk1").attr('checked')==undefined) //判断是否已经打勾
单选组radio: $("input[@type=radio]").attr("checked",'2');//设置value=2的项目为当前选中项
下拉框 select: $("#sel").attr("value",'-sel3');//设置value=-sel3的项目为当前选中项
$("
$("#sel").empty();// 清空下拉框
获取一组radio被选中项的值
var item = $('input[@name=items][@checked]').val();
获取select被选中项的文本
var item = $("select[@name=items] option[@selected]").text();
select下拉框的第二个元素为当 前选中值
$('#select_id')[0].selectedIndex = 1;
radio单选组的第二个元素为当前选中值
$('input[@name=items]').get(1).checked = true;
获取值:
文本框,文本区域:$("#txt").attr("value");
多选框 checkbox:$("#checkbox_id").attr("value");
单选组radio: $("input[@type=radio][@checked]").val();
下拉框select: $('#sel').val();
控 制表单元素:
文本框,文本区域:$("#txt").attr("value",'');//清空内容
$("#txt").attr("value",'11');// 填充内容
多选框checkbox: $("#chk1").attr("checked",'');//不打勾
$("#chk2").attr("checked",true);// 打勾
if($("#chk1").attr('checked')==undefined) //判断是否已经打勾
单选组radio: $("input[@type=radio]").attr("checked",'2');//设置value=2的项目为当前选中项
下拉框 select: $("#sel").attr("value",'-sel3');//设置value=-sel3的项目为当前选中项
$(" ").appendTo("#sel")//添加下拉框的option
$("#sel").empty();// 清空下拉框

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



Asynchronous processing method of SelectChannelsGo concurrent programming using golang Introduction: Concurrent programming is an important area in modern software development, which can effectively improve the performance and responsiveness of applications. In the Go language, concurrent programming can be implemented simply and efficiently using Channels and Select statements. This article will introduce how to use golang for asynchronous processing methods of SelectChannelsGo concurrent programming, and provide specific

How to hide the select element in jquery: 1. hide() method, introduce the jQuery library into the HTML page, you can use different selectors to hide the select element, the ID selector replaces the selectId with the ID of the select element you actually use; 2. css() method, use the ID selector to select the select element that needs to be hidden, use the css() method to set the display attribute to none, and replace selectId with the ID of the select element.

jQuery is a popular JavaScript library that can be used to simplify DOM manipulation, event handling, animation effects, etc. In web development, we often encounter situations where we need to change event binding on select elements. This article will introduce how to use jQuery to bind select element change events, and provide specific code examples. First, we need to create a dropdown menu with options using labels:

Because select allows developers to wait for multiple file buffers at the same time, it can reduce IO waiting time and improve the IO efficiency of the process. The select() function is an IO multiplexing function that allows the program to monitor multiple file descriptors and wait for one or more of the monitored file descriptors to become "ready"; the so-called "ready" state is Refers to: the file descriptor is no longer blocked and can be used for certain types of IO operations, including readable, writable, and exceptions. select is a computer function located in the header file #include. This function is used to monitor file descriptor changes—reading, writing, or exceptions. 1. Introduction to the select function. The select function is an IO multiplexing function.

1. Keywords in SQL statements are not case-sensitive. SELECT is equivalent to SELECT, and FROM is equivalent to from. 2. To select all columns from the users table, you can use the symbol * to replace the column name. Syntax--this is a comment--query out [all] data from the [table] specified by FEOM. * means [all columns] SELECT*FROM--query out the specified data from the specified [table] from FROM Data of column name (field) SELECT column name FROM table name instance--Note: Use English commas to separate multiple columns selectusername, passwordfrom

Implementing SelectChannels through golang Performance optimization of Go concurrent programming In the Go language, it is very common to use goroutine and channel to implement concurrent programming. When dealing with multiple channels, we usually use select statements for multiplexing. However, in the case of large-scale concurrency, using select statements may cause performance degradation. In this article, we will introduce some implementations of select through golang

SelectChannels for Reliability and Robustness Using Golang Introduction to Concurrent Programming: In modern software development, concurrency has become a very important topic. Using concurrent programming can make programs more responsive, utilize computing resources more efficiently, and be better able to handle large-scale parallel computing tasks. Golang is a very powerful concurrent programming language. It provides a simple and effective way to implement concurrent programming through go coroutines and channel mechanisms.

How to use golang for SelectChannelsGo concurrent programming Go language is a language that is very suitable for concurrent programming, in which the channel (Channel) and the Select statement are two important elements to achieve concurrency. This article will introduce how to use golang's SelectChannels for concurrent programming and provide specific code examples. 1. The concept of channel Channel is used for communication and data between goroutines
