javascript 语法错误，无法识别的表达式：option[value=property name]
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Syntax error, unrecognized expression: option[value=property name]
提问by runningmark
I have a datalist which looks like this
我有一个看起来像这样的数据列表
<datalist id="properties">
<option value="property name"></option>
<option value="property"></option>
</datalist>
Now I'm using this code to find where values entered by the user is in the list:
现在我正在使用此代码来查找用户输入的值在列表中的位置：
var user_property = $('#user_property').val().toLowerCase(); // taken from input type with id user_property
var pro = $('#properties').find("option[value="+user_property.replace(' ','-')+"]");
if(pro != null && pro.length > 0)
{
// run some code
}
else
{
// show error popup
}
I am getting error in var pro = $('#properties').find("option[value="+user_property.replace(' ','-')+"]");
我遇到错误 var pro = $('#properties').find("option[value="+user_property.replace(' ','-')+"]");
Error code says Syntax error, unrecognized expression: option[value=property name]
错误代码说 Syntax error, unrecognized expression: option[value=property name]
How to get rid of this error?
如何摆脱这个错误？
回答by Sudhir Bastakoti
try adding quotes, as:
尝试添加引号，如：
var pro = $('#properties').find("option[value='"+user_property.replace(' ','-')+"']");
or better break it down to:
或者更好地将其分解为：
var replaced = user_property.replace(' ','-');
var pro = $('#properties').find("option[value='"+replaced+"']");
if you want to check for text like "property name" then you could directly do:
如果要检查“属性名称”之类的文本，则可以直接执行以下操作：
var pro = $('#properties').find("option[value='"+user_property+"']");
回答by Sameer Alibhai
Try adding quotes around the value and it will work.
尝试在值周围添加引号，它会起作用。
$('#properties').find("option[value='property name']")
回答by Sadikhasan
You need to add single quote for your value like
您需要为您的价值添加单引号，例如
var pro = $('#properties').find("option[value='"+user_property.replace(' ','-')+"']");
