Where the former extension searched on a key-value pair, with this extension you can additionally search for the presence of a data attribute, irrespective of its value. Vivamus sagittis lacus vel augue laoreet rutrum faucibus dolor auctor. Things you can do with data attributes The examples above are very basic, but you can do so much with custom data attributes. I think that is worth the extra tenth of a second it takes to run one querySelectorAll statement, as it insures that the ongoing performance of the page is not disrupted for the sake of shaving microseconds off of load time. Not the answer you're looking for? How do data attributes work? Browse other questions tagged or. These attributes are not intended for use by software that is independent of the site that uses the attributes. To keep things valid, you had to stuff things into rel or class attributes.
Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. The use of data attributes shows the developer intent upon scanning as opposed to reading line by line: Example: In my opinion is hard to read and complicated as more styling classes are used to generate the effective style. I am able to locate the jquery but unable to select single name,i. Well, you can if you serialize them, but we'll save that for another post. Here's an example of a : Popover on top A better way to store data Custom data attributes are widely used all over the web.
Etiam porta sem malesuada magna mollis euismod. Vivamus sagittis lacus vel augue laoreet rutrum faucibus dolor auctor. Aenean lacinia bibendum nulla sed consectetur. Although there is some overlap in how data attributes and. Some developers even created their own custom attributes. Vivamus sagittis lacus vel augue laoreet rutrum faucibus dolor auctor.
Aenean lacinia bibendum nulla sed consectetur. I've shown you a few common ways to use custom data attributes. Nulla vitae elit libero, a pharetra augue. That same logic can be applied here surely? For now, just know that you're pretty much limited to storing strings. Would you like to answer one of these instead? I tried with following code firefox. Boy, was it a mess.
Of course there are other situations where the data attribute comes in handy. Maecenas sed diam eget risus varius blandit sit amet non magna. In this example, let's add these lines of code to our index. At the same time, we will pass the sets of names and values into the method at once using a map —. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.
In this example, we will change a displayed image using jQuery to replace an image source file, along with the alt and title, but first we will add in the following to our index. Say you want to dynamically load a video object. Here are a few examples off the top of my head. Filtering Say you have a list of things and you want to filter them by keyword. If you're not familiar with it, just stick with. Cras mattis consectetur purus sit amet fermentum. Clicking on the Switch button again resets the id to the original.
A map of attribute-value pairs to set each key-value pair in the map adds or modifies an attribute. If the data is crucial to the user, it should be presented in a visible and more accessible way. Add the following jQuery to the event handler just below the previous code in the index. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Cras mattis consectetur purus sit amet fermentum. Now you can store arbitrary data in an easy, standards-compliant way.
In his follow up article,. An object can be passed to jQuery. Maecenas sed diam eget risus varius blandit sit amet non magna. This way we can use it throughout the whole site. Vivamus sagittis lacus vel augue laoreet rutrum faucibus dolor auctor.