Gregory's Blog

How to add additional descriptive elements to an element with 'data-'

While coding logic for a Kendo tooltip, I had to send both the anchor's title and other information that the Kendo tooltip would display. I wanted to display the location where the image was taken, and a description of the image like this:

"Grand Prismatic Spring, Yellowstone National Park.

The vibrant colors of this spring is best captured from over-head. Wouldn't it be cool to fly a drone over this and take a few pictures?"

I wanted both elements to be separated with a horizontal rule, and I needed to isolate the location and the description. However, the anchor tag only has a 'title' and an alt tag to store this information.

If you want to store additional information in an element does not support, you can easily use the 'data-' + name prefix like so:

view plain about
1<span title="Grand Prismatic Spring, Yellowstone National Park." data-desc="The vibrant colors of this spring is best captured from over-head. Wouldn't it be cool to fly a drone over this and take a few pictures?">

To get the information that the data element contains, in this case, a Kendo template, use the data- prefix. You can name the prefix anything you want, and within the javascript template, don't need to specify the actual data tag- just leave it blank but name the variable after the 'data-' element (see ''desc')#: below).

view plain about
1<!--- Kendo tooltip template--->
2<InvalidTag id="aboutTemplate" type="text/x-kendo-template">
3    <div class="template-wrapper">
4        <h3>'title')# </h3>
5        <p>'desc')#</p>
6    </div>

This is a neat way to store additional data into HTML elements, such as a span tag, or any other element as well.

This entry was posted on March 29, 2019 at 2:16 PM and has received 16 views.

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Kendo Server Side Validation

This post describes how to use Kendo's validator for server side validation. There are very few posts showing how to use Kendo's validator with server side validation (none of them are really clear), it took me a bit of time to figure it out, and want to share my approach and will provide extensive comments.

One of the reasons that there are very few posts concerning server side validation with the Kendo validator is that it is not really built to do this. Unlike the majority of the other Kendo widgets which allow for customization, the validator was meant for simple validation. The built in validation is quite useful for simple client side validation, but it is not an extensive validation library and anytime that you need to extend it you will find yourself wanting more. I felt like I was trying to hammer a square peg into a circle while coding this. However, since one of the main goals of this blog is to share how ColdFusion can use the Kendo UI, I felt the need to dig into the kendo validator.

I have a captcha form on this blog that is used to verify that the user is an actual user, and it encrypts a token and passes it off to the server side for validation. You can see this in action by making a comment on this post below.

The meat and potatoes of this function, like most of the other Kendo widgets, lies in the Javascript. This script is heavily commented. Click the more button below to inspect the script.

This entry was posted on March 1, 2019 at 5:34 PM and has received 51 views.

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Portions of Gregory's Blog are powered on the server side by BlogCfc, an open source blog developed by Raymond Camden. Revitalizing BlogCfc was a part of my orginal inspiration that prompted me to design this site. Some of the major open source contributers to BlogCfc include:

  1. Peter Farrell: the author of 'Lyla Captcha' that is used on this blog.
  2. Pete Freitag: the author of the 'ColdFish' code formatter that is also used on this blog.