Selector on a variable content with jQuery

Question

I have this code :

jQuery('#btSave').click(function (event) {
    var jqxhr = $.post("Controller/Action", {
        lastName: $("#LastName").val()      
    },
    function (data) {
        //here
    })
});

I'd like to know if in the "data" variable the id "Mydiv" exist

How can I don this ?

Thanks,

Do you mean jQuery data (http://api.jquery.com/jQuery.data/) or a `data` attribute? Also, what relevance does the code you posted have? — Matt, Jun 07 '11 at 07:18

score 2 · Answer 1 · edited May 23 '17 at 12:12

2

You can i either use RegEx or make use of String Manipulation function like IndexOf...

or

try search() String method.

 var isFound = data.search(new RegExp(/Mydiv/i));

if you are using jQery than here is alredy given answer

jQuery .search() to any string

Find text string using jQuery?

edited May 23 '17 at 12:12

Community

1
1

answered Jun 07 '11 at 07:19

Pranay Rana

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Parsing HTML with regular expressions is fraught with peril. Not recommended. Using `String#indexOf` means any occurrence of "Mydiv" would match, even if not an `id`. – T.J. Crowder Jun 07 '11 at 07:34

T.J. Crowder · Accepted Answer · 2011-06-07T07:50:04.493

I assume data is a string containing HTML markup. If so, then:

var tree = $(data);
if (tree.find("#Mydiv")[0]) {
    // An element with the `id` "Mydiv" exists in the tree
}

You don't have to use a variable, you could just do this:

if ($(data).find("#Mydiv")[0]) {
    // An element with the `id` "Mydiv" exists in the tree
}

...but I just assume you're probably going to want to do something else with tree afterward, so we want to avoid parsing it more than once.

Note: If the "Mydiv" element may be at the top level of the HTML in data, you'll want to wrap that structure in a parent element for the above to work (there are other ways, but they're more complicated). So if that may be the case, use $("<div>" + data + "</div>") rather than just $(data). This is because find searches descendant elements, so if the HTML were "hi", it wouldn't find it as it's not a descendant (it's the element itself).

Update: Here's a live example

J.Crowder the look not working. In fact, if "Mydiv" id is present in data, the UI behavior change (show/hide other div) — TheBoubou, Jun 07 '11 at 07:37
@Kris-I: Works for me. Just added a live example. Perhaps if you compare what's different, it'll help you figure it out. — T.J. Crowder, Jun 07 '11 at 07:50

score 0 · Answer 3 · edited Mar 14 '13 at 21:06

0

var result="limitless isa web ...";
if(result.search('limitless')>=0) // or another text Example: web
 {
   alert("ok");
 }

edited Mar 14 '13 at 21:06

Andrew Barber

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answered Dec 12 '12 at 13:52

Limitless isa

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score 0 · Answer 4 · answered Jun 07 '11 at 07:21

0

This will do if i understood correctly.

if($("#Mydiv",data).length)
{
    //Mydiv exists
}

answered Jun 07 '11 at 07:21

Jishnu A P

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I don't think you can pass a string as the context parameter. Pretty sure `data` is a string in this case. – T.J. Crowder Jun 07 '11 at 07:28

score 0 · Answer 5 · answered Jun 07 '11 at 08:47

To the extent of my understanding...

if you are trying to find div with id 'myDiv' in data... you can do this..

function (data) {
        if($("#Mydiv",data)) {
            // this should do
        } 
    })

Be little more clear in explaining what you want....

Selector on a variable content with jQuery

5 Answers5