HTML | Robert James Metcalfe Blog

Webcam Canvas Transform Tutorial

The HTML(5) canvas elements that underpin the webcam ideas of Webcam Mobile Deprecation Revisit Tutorial‘s web application got us to thinking about … getImageData … and … putImageData … respectively the “readers” and “writers” of pixel data out of and … Continue reading →

Flowchart and Venn Diagram Loose Text Tutorial

In constructing yesterday’s Ajax Auto-completion Refinement Tutorial‘s flowchart tutorial picture via Flowchart and Venn Diagram Glow Tutorial‘s Flowchart and Venn Diagram web application, we found it had shortfalls performing the “Yes” and “No” (what we call loose) text annotations that … Continue reading →

Javascript Replace RegExp Multiline ExecCommand Tutorial

The star HTML element of the recent Javascript Replace RegExp Multiline Primer Tutorial was the … textarea … and a regular reader will know how we here like to associate textarea thinking with … div contenteditable=true … thinking, representing alternative … Continue reading →

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Latest Comments
1. Sean Zhang on Cocos2d Mac Game Hello World Cocos Creator TutorialNovember 14, 2026
  The Hello World starting point makes it easier to separate project setup from asset problems. A useful follow-up would be importing a small sprite sheet and checking frame dimensions, ordering and padding before adding animation logic. Previewing the individual frames first can help identify whether a problem comes from the artwork or from the engine configuration.
2. Hello Team on Javascript Course Primer TutorialNovember 13, 2026
  The distinction between course-driven and immersion-driven learning is useful. A small extension to the australia.htm exercise would be a set of named map markers and a text filter: first update the visible markers on an input event, then add a collected/uncollected toggle, and finally persist only that toggle state in localStorage. That gives beginners a concrete reason to learn arrays, DOM updates and browser storage without needing PHP or MySQL first. It is also worth testing empty searches, a page reload and disabled storage separately; those are different failure cases. Disclosure: we maintain the GTA 6 interactive map. I am suggesting it as an example of a map-and-progress interface, not claiming that we used the tutorial code. Would you introduce persistence after the first working interaction, or keep the initial exercise entirely stateless?
3. tooloteca on Tabular Single Row Radio Play TutorialNovember 12, 2026
  What I find most interesting here is how honestly the post names the hard part: getting focus to work with [element].click() and [element].blur() is the kind of detail that looks trivial until you actually try to drive a page this way. The single-row table that deliberately overflows to the right also makes sense as a design choice, since a radio playlist needs to be scrolled through rather than squeezed into one screen. And the payoff — clicking one song link and having the songs play in sequence and loop back through the list — is a neat reward for all that plumbing with the audio-only YouTube player.
4. Aleister on Tabular Single Row Radio Play TutorialOctober 22, 2026
  I like the single-row radio-play approach for keeping the controls compact while still making each selection clear. When I’m checking a calculation alongside a tutorial, I use StepStat to see the intermediate steps; how do you handle the layout when the playlist gets much longer?
5. anagrampuzzle on Tabular Single Row Radio Play TutorialOctober 18, 2026
  The idea of mapping a video's key scenes, mood, pacing, and audio before production resonates with me — it's a lot like working out an anagrampuzzle, where the same pieces only make sense once you rearrange them into the right order. Do you usually sketch the mind map before or after the script is locked?

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Flowchart and Venn Diagram Mobile Tutorial

Webcam Canvas Transform Tutorial

Flowchart and Venn Diagram Loose Text Tutorial

Javascript Replace RegExp Multiline ExecCommand Tutorial

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