javascript字符串串联到jquery选择器

Question

I know its a silly question to ask, but may be I am missing something. So, I have

data = "ajey"

and then,

I want to select an li item from ul whose id is "ajey"

I am trying with

$('#users li#data').css('background-color', 'red');

but this returns an empty array. I know the mistake is in li#data

#users is the id of the ul element

Any help is greatly appreciated.

Answer 1

由于ID是唯一的，因此您可以：

$('#' + data).css('background-color', 'red');

Answer 2

You can just concatenate the strings with + as you would normally do:

$('#users li#' + data).css('background-color', 'red');

If you are doing this, make sure that the value of data is trusted.

Answer 3

$('#users li#'+data).css('background-color', 'red');

Answer 4

采用

$('#users li#' + data).css('background-color', 'red');