how to check if div has id or not?

Question

```

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``` I am trying to loop through class but issue is i have card1 and card2 ids duplicate in that page. but above code seems to work but showing below error. ``` Uncaught Type Error: Cannot read property 'length' of undefined ``` I am trying to get ids from the loop which are there.

Accepted Answer

Use attribute selector `selector[attribute]` to get only the elements that have an ID

```
$('.myClass[id]')   // Get .myClass elements that have ID attribute
```

In your case:

```
$('.ui-droppable[id]').each(function(){
   alert( this.id );
});
```

jsFiddle demo

how to check if div has id or not?

Solution

Problem