CODEWITHSUNDEEP
javascriptjquery
Hao
Hao

Reputation: 8115

How to get the object's id?

How to get the id on an object, i know the id is hola, but i need to get it during runtime

alert($('#hola').id);

The idea is this:

<script>

    (function ($) {

    $.fn.hello = function(msg) {
        alert('message ' + msg);
        alert('is from ' + this.id); // this.id doesn't work
    };

    })(jQuery);


    $('#hola').hello('yo');

</script>

Upvotes: 5

Views: 69408

Answers (3)

Andy E
Andy E

Reputation: 344527

The most efficient approach would be:

this[0].id

this.attr("id") takes longer to achieve the same thing because many checks are made and different codepaths are followed based on the parameter passed. Depending on how often you call the function, there could be a significant difference on, say, a mobile browser with a slow processor.

You can read more about this here.

Upvotes: 9

Shadow Wizard
Shadow Wizard

Reputation: 66388

You can read it as atttibute:

alert($('#hola').attr('id'));

Upvotes: 5

Joachim Sauer
Joachim Sauer

Reputation: 308001

Use attr() to read attributes:

alert($('#hola').attr('id'));

Upvotes: 12

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