HTML | Robert James Metcalfe Blog

Input Colour Picker Multiple Linear Gradient Background Primer Tutorial

We’ve got two ideas floating around today’s proof of concept “Input Colour Picker Multiple Linear Gradient Background” web application concept, the second being the “proof of concept” bit, at least for us … dynamically created linear-gradient backgrounds (as you can … Continue reading →

HTML and Javascript and CSS Survey Traverse Co-ordinates Tutorial

Today we revisit our HTML and Javascript and CSS Survey Traverse Tutorial web application because we want to allow it to be able to … do its usual entering of theodolite measured angles and distance measurements to glean Easting,Northing co-ordinates … Continue reading →

HTML Enabled and Disabled Buttons Game Tutorial

During a period when working with accountancy desktop applications with SAP Business One and Accpac some years back, a crucial aspect to make the GUI applications work, was to do with the enabling and disabling of buttons as the processing … Continue reading →

WebRTC API Primer Tutorial

We were on the lookout for WebRTC sample web applications today, and came upon the great GitHub WebRTC samples … thanks … This is a collection of small samples demonstrating various parts of the WebRTC APIs. The code for all … Continue reading →

CSS Gradient Creations Sharing Tutorial

Turning a web application like yesterday’s CSS Gradient Creations Tutorial “Gradient Creations” one into a web application where you can share your discoveries is an exercise in both … sharing and collaboration … as well as … accountability … opening … 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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Tag Archives: HTML

Input Colour Picker Multiple Linear Gradient Background Primer Tutorial

HTML and Javascript and CSS Survey Traverse Canvas Tutorial

HTML and Javascript and CSS NSW State Survey Traverse Tutorial

HTML and Javascript and CSS Survey Traverse Co-ordinates Tutorial

HTML Enabled and Disabled Buttons Game Tutorial

WebRTC API Primer Tutorial

Numbers Guessing Game

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