function displayResult(){ var x=document.getElementById("mySelect").selectedIndex; var y=document.getElementsByTagName("option"); alert("" + y[x].text + " 是默认选项吗? " + y[x].defaultSelected); } </script> </head> <body> <form> 选择你最喜欢的水果: <select id="mySelect"> <...
function displayResult(){ var x=document.getElementById("mySelect").selectedIndex; var y=document.getElementsByTagName("option"); alert("" + y[x].text + " 是默认选项吗? " + y[x].defaultSelected); } </script> </head> <body> <form> 选择你最喜欢的水果: <select id="mySelect"> <...
optionObject.defaultSelected 浏览器支持 所有主要浏览器都支持 defaultSelected 属性 实例 实例 下面的例子可检测所选项是否是默认选项: <html> <head> <script> function displayResult() { var x=document.getElementById("mySelect").selectedIndex; var y=document.getElementsByTagName("option"); alert("Is ...
optionObject.defaultSelected实例 下面的例子可检测所选项是否是默认选项: <html> <head> <script type="text/javascript"> function alertDefaultSelected() { var x=document.getElementById("mySelect").selectedIndex; var y=document.getElementsByTagName("option"); var txt="Is " + y[x].text + " s...
varx = document.getElementById("mySelect").selectedIndex; vary = document.getElementsByTagName("option"); alert("Is "+ y[x].text+" selected by default? "+ y[x].defaultSelected); Try it Yourself » Description The defaultSelected property returns the default value of the selected attribut...
How can i set the default value of selection option in html <select name="transporttype" id="transportmode" required="required" > <option value="sea" >Sea</option> <option value="air">Air</option> <option value="land" >Land</option> </select> above code when i display it show ...
form->setBooleanAttribute(HTMLNames::novalidateAttr,true); EXPECT_EQ(String(), select->defaultToolTip()) <<"defaultToolTipfor SELECT with FORM[novalidate] and required attribute should return null string."; EXPECT_EQ(select->defaultToolTip(), option->defaultToolTip()); ...
套件: Microsoft.AspNetCore.App.Ref v8.0.0 <產生 optgroup > 和 < option > 元素。C# 複製 public Microsoft.AspNetCore.Html.IHtmlContent GenerateGroupsAndOptions (string optionLabel, System.Collections.Generic.IEnumerable<Microsoft.AspNetCore.Mvc.Rendering.SelectListItem> selectList...
And value-key is pointing to the unique identifier property in each of those objects, like it is shown here: https://element-plus.org/en-US/component/select.html#use-value-key-attribute Contributor kaine0923 commented Aug 31, 2023 :value="item.value" :value="item.other" The value of...
In this scenario, users are prompted to select their default application when they open a link or a htm/html file.Set Microsoft Edge as the default browser on domain-joined devicesYou can set Microsoft Edge as the default browser on domain-joined devices by configuring the Set a default ...