Code change:
Fulfill the below user stories and get all of the tests to pass. Use whichever libraries or APIs you need. Give it your own personal style. <del> You can use HTML, JavaScript, CSS, and the D3 svg-based visualization library. The tests require axes to be generated using the D3 axis property, which automatically generates ticks along the axis. These ticks are required for passing the D3 tests because their positions are used to determine alignment of graphed elements. You will find information about generating axes at <https://github.com/d3/d3/blob/master/API.md#axes-d3-axis>. Required (non-virtual) DOM elements are queried on the moment of each test. If you use a frontend framework (like Vue for example), the test results may be inaccurate for dynamic content. We hope to accommodate them eventually, but these frameworks are not currently supported for D3 projects. </del> <ins> You can use HTML, JavaScript, CSS, and the D3 svg-based visualization library. The tests require axes to be generated using the D3 axis property, which automatically generates ticks along the axis. These ticks are required for passing the D3 tests because their positions are used to determine alignment of graphed elements. You will find information about generating axes at <https://github.com/d3/d3/blob/master/API.md#axes-d3-axis>. Required DOM elements are queried on the moment of each test. If you use a frontend framework (like Vue for example), the test results may be inaccurate for dynamic content. We hope to accommodate them eventually, but these frameworks are not currently supported for D3 projects. </ins> **User Story #1:** My tree map should have a title with a corresponding `id="title"`.

Related discussion:
text: In the 5 certification projects for the Data Visualization certificate, the phrase "(non-virtual) DOM elements" is used without any prior explanation (I checked the Data Visualization curriculum and no such phrase was introduced at any point). It is not clear therefore to the learner what the requirement "Required (non-virtual) DOM elements are queried on the moment of each test." could actually mean. Now, maybe it means "actual DOM' vs "virtual DOM" from the React curriculum. But requiring that a priori knowledge to understand a Data Visualization project requirement seems like overkill? I propose that this requirement in all 5 projects be stated simply as "Required DOM elements..." The chance of someone not understanding that we mean 'actual DOM elements' seems miniscule to me in the context of these challenges, but I'm not a web developer, so if there is a valid reason to use the term 'non-virtual DOM elements', it would be very interesting for me to learn/hear of it. ps. should this issue be accepted, please also fix the phrasing "on the moment" to be "at the moment" which I believe is what was actually meant. update all 5 certification project statements referring to (non-virtual) DOM elements as per the above discussion. No response N/A No response
I think this is more of a note for advanced campers, similar to mentioning that the tests might not work with a framework like Vue.
Yes I think so too, but it is too confusing to someone who is not that advanced. If we didn't say it, what is the chance an advanced camper will run into a problem?
It likely wouldn't - though I also haven't seen much mention of beginners who do have confusion.
I agree that I haven't seen questions on this either but since the rule-of-thumb is to not include undefined technical terms in the challenges and projects, we should do something about this one. (Either define it or drop it)
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