</title></head><body><h1style="color: green">GeeksforGeeks</h1><b>How to get selected value in dropdown list using JavaScript?</b><p>Select one from the given options:<selectid="select1"><optionvalue="free">Free</option><optionvalue="basic">Basic</option><optionvalue="premium">Pr...
当用户点击按钮时,会调用getSelectedValue函数,弹出一个对话框显示当前选中的值。 2. 获取选中值的几种方法 方法1:使用value属性 <select>元素的value属性始终包含当前选中的值。我们可以直接使用这个属性来获取选中的值。 var selectElement = document.getElementById('mySelect'); var selectedValue = selectElement...
let selectElement = document.getElementById('myMultiSelect'); let selectedValues = Array.from(selectElement.options).filter(option => option.selected).map(option => option.value); 2. 使用querySelectorAll和Array.from 还可以使用CSS选择器配合querySelectorAll来直接找到所有被选中的option元素,然后将它...
<option value="" selected="selected">ajax实验</option> <option value="4">我适宜市哈</option> </select> 使用 document.getElementById("bigclass").options[window.document.getElementById("bigclass").selectedIndex].text 的结果是:我适宜市哈 使用 window.document.getElementById("bigclass").value ...
window.document.getElementById("bigclass").value 获取select组分配的索引id window.document.getElementById("bigclass").selectedIndex 例子: <select name="bigclass" id="bigclass" onChange="javascript:updatePage2();"> <option value="" selected="selected">ajax实验</option> ...
// 引入Zdog库importZdogfrom'zdog';// 创建一个画布constcanvas=document.querySelector('canvas');// 创建一个Zdog.Illustration实例,指定画布和一些配置选项constillustration=newZdog.Illustration({element:canvas,zoom:1,// 缩放级别});// 创建一个Zdog.Box实例,指定位置、尺寸和颜色constbox=newZdog.Box({ad...
textarea.value = contentdocument.body.appendChild(textarea)textarea.select()document.execCommand("Copy")textarea.remove()} copyToClipboard('hello medium') 3. 获取URL中的查询参数 constparseQuery =(name) =>{returnnewURL(window.location.href).searchParams.get(...
function GetValue() { var strUrl; strUrl=window.document.getElementById("friendLink").value; window.open("http://22+strurl/); } </script> //根据链接类型读取数据库中的数据 public static string GetLink(string type) { string sqlTemp = "select * from shang_cms_friends where lianjie_pic ...
var city_sel=document.getElementById("city");//获得市select for(var i=0;i<province_sel.options.length;i++){ if(province_sel.options[i].value=="从数据库获取的省的值"){ province_sel.options[i].selected=true; break; } } initCity("从数据库获取的省的值");//初始化市select ...
Selects the given tab and shows its associated content. Any other tab that was previously selected becomes unselected and its associated content is hidden. Returns to the caller before the tab pane has actually been shown (i.e. before the shown.bs.tab event occurs). $('#someTab').tab('...