javascript 如何使用jquery从选项中删除“selected”属性
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/13858077/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to delete "selected" attribute from option using jquery
提问by Uzair
I want to remove the "selected" attribute from an option element when I uncheck this. I dont want to make value false or anything... I just want to delete this property. My code is like
当我取消选中此项时，我想从选项元素中删除“selected”属性。我不想让 value false 或任何东西......我只想删除这个属性。我的代码就像
$(function() {
$("#deployselect").multiselect({
click: function( event, ui ) {
if(ui.checked==false){
$("#deployselect option[value='"+ui.value+"']").removeAttr("selected");
}
}
});
});
My generated HTML is like this
我生成的 HTML 是这样的
<option value="68" selected>A1</option>
<option value="49" selected>A2</option>
<option value="69" selected>A3</option>
so even i make "attr" or "prop" false it is not working. :(
所以即使我将“attr”或“prop”设为假，它也不起作用。:(
回答by T.J. Crowder
If you want to de-select it, change this line:
如果要取消选择它，请更改此行：
$("#deployselect option[value='"+ui.value+"']").removeAttr("selected");
to
到
$("#deployselect option[value='"+ui.value+"']").prop("selected", false);
(Assuming jQuery 1.6 or later; for earlier versions, change propto attr.)
（假设 jQuery 1.6 或更高版本；对于早期版本，更改prop为attr.）
Once the HTML has been parsed into the DOM, the optionelementhas a property called selectedwhich gets its initial value from the selectedattribute in the HTML (defaulting to false). So once you're dealing with DOM elements, you're dealing with a boolean property, not an attribute anymore.
一旦 HTML 被解析为 DOM，option元素就会有一个被调用selected的selected属性，该属性从 HTML 中的属性（默认为false）中获取其初始值。因此，一旦您处理 DOM 元素，您就处理的是一个布尔属性，而不是属性。
回答by StudioX
A simple option is to set selector value to empty so all checked list will uncheck
一个简单的选项是将选择器值设置为空，以便所有选中的列表都将取消选中
$("#deployselect").val([]);
