attr('selected','selected') 在 jquery 中不起作用
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attr('selected','selected') not work in jquery
提问by Shree
$('#sellist option').each(function(index) {
var str ='4/5/8';
var substr = str.split('/');
if (substr[0] == $(this).attr('value')) {
$(this).attr('selected','selected');
alert('hi'); ///For check
}
});
Every thing works fine and alertis fired. I havent any error in console. But #sellist optionis not selected which I want. What is my problem. Thanks.
一切正常并被alert解雇。我在控制台中没有任何错误。但#sellist option没有选择我想要的。我的问题是什么。谢谢。
回答by Brynner Ferreira
Replace attr by prop.
用 prop 替换 attr。
$('#element').prop('selected', true);
回答by Rory McCrossan
Your code is working fine. It is just selecting the first element of your array, 4because you are not looping through the array, you just use substr[0]to get the first value.
您的代码运行良好。它只是选择数组的第一个元素，4因为您没有遍历数组，您只是substr[0]用来获取第一个值。
To see that it works I changed the initial value to 7:
为了查看它是否有效，我将初始值更改为7：
$('#sellist option').each(function(index) {
var str = "7/5/8";
var substr = str.split('/');
if (substr[0] == $(this).val()) {
$(this).attr('selected', 'selected');
alert($(this).val()); ///For check
}
});
OP Clarified he want to loop around array
OP 澄清他想循环数组
To loop through your array and select each value in the multiple select, use this:
要循环遍历数组并选择多选中的每个值，请使用以下命令：
$('#sellist option').each(function(index) {
var str = "4/5/8";
var substr = str.split('/');
for (var i = 0; i < substr.length; i++) {
if (substr[i] == $(this).val()) {
$(this).attr('selected', 'selected');
}
}
});
回答by jabclab
$(this).attr('selected','selected');
should be replaced by:
应替换为：
$(this).attr('selected', true);
回答by xdazz
If you want one option to be selected, for example, you want the option with value 4to be selected, just do $('#sellist').val('4');
如果您希望选择一个选项，例如，您希望选择具有值的选项4，只需执行$('#sellist').val('4');
回答by Robin Castlin
$(this).attr('selected', true);should do the trick for ya.
$(this).attr('selected', true);应该为你做的伎俩。
回答by Akhil Thayyil
You can do like this
你可以这样做
$('#sellist').val($(this).attr('value'));
回答by Emre Erkan
You can make it like this:
你可以这样做：
var str ='4/5/8';
$.each(str.split('/'), function(i, val) {
$('#sellist option').filter('[value="' + val + '"]').prop('selected', 'selected');
});
Working example on jsFiddle
jsFiddle 上的工作示例
