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#9502 closed enhancement (invalid)
Opened June 02, 2011 09:09PM UTC
Closed June 04, 2011 05:21PM UTC
Last modified October 06, 2011 05:41PM UTC
provide .hasData() method for consistency
| Reported by: | shikakaa@gmail.com | Owned by: | shikakaa@gmail.com |
|---|---|---|---|
| Priority: | low | Milestone: | 1.next |
| Component: | data | Version: | 1.6.1 |
| Keywords: | Cc: | ||
| Blocked by: | Blocking: |
Description
In the data category, all methods (queue, dequeue, data and removedata) have a jQuery.method() and .method() version, except for hasdata.
hasData should also be available in the latter format.
jQuery(element).hasData(key) returns boolean, true if key data field is set on element.
this would be a convenient way to avoid reference errors and having to check the value.
Attachments (0)
Change History (5)
Changed June 02, 2011 10:15PM UTC by comment:1
| _comment0: | Without adding a single line of code to jQuery and only costing you 1 character, instead of 3... \ \ http://jsfiddle.net/rwaldron/3EyaP/ → 1307052938739557 |
|---|---|
| component: | unfiled → data |
| owner: | → shikakaa@gmail.com |
| priority: | undecided → low |
| status: | new → pending |
Changed June 03, 2011 06:51AM UTC by comment:2
| status: | pending → new |
|---|
I think I understand what you're saying, but your example is flawed - at least in chrome -, all tests return true but only the second should.
Changed June 04, 2011 05:21PM UTC by comment:3
| resolution: | → invalid |
|---|---|
| status: | new → closed |
jQuery.hasData() is *only* meant to determine if a data object exists on an element at all and says nothing about whether a particular data key exists inside the data object.
I don't think the described functionality is needed, and it's easy to add yourself if you want it -- or just check for the data being undefined. We certainly wouldn't want to call it .hasData() since that would be confusing.
Changed June 04, 2011 05:40PM UTC by comment:4
Look closer... 1 & 3 have negation operators at the front of the expression. #2 had double negation.
Here's a clearer example: http://jsfiddle.net/rwaldron/3EyaP/5/
Without adding a single line of code to jQuery and only costing you 1 or 2 characters, instead of 3...
http://jsfiddle.net/rwaldron/3EyaP/