In web-development circles, it is a well-known fact that trying to validate an email using a regular expression is… complex. The full set of modern email standards allows for such wonderful addresses as: chief.o'brien+ds9@spásárthach.भारत So determining whether or not your user has entered a valid email address becomes an ever-increasing challenge. But what if you […]
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Yesterday I was on a train. I clicked on a link and my browser loaded a long article for me to read. Halfway through reading it, the train went into a tunnel and I lost signal. That meant I couldn't see the images on the other half of the page for the rest of the […]
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There's a link, right here ➡️⬅️ but, if you're on a touchscreen, you can't tap on it. Using a mouse? Nope, that won't work either. The only way to navigate to it is via keyboard navigation. Hit your Tab ⭾ button! There's a little bit of me wants to build an entire website which can […]
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I want to detect if a web browser is running on a device which is capable of placing a telephone call. Is that possible? I'm going to go with a cautious "no - not quite". Although there are several proxies which get you part of the way there. Here's a link to a telephone number […]
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If you hang around with computerists long enough, they start talking about the Semantic Web. If you can represent human knowledge in a way that's easy for computers to understand it will be transformative for information processing. But computers, traditionally, haven't been very good at parsing ambiguous human text. Suppose you saw this text written […]
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Sometimes you learn the most from failures! I wanted a <select multiple> element where the <options> were laid out in a grid. I nearly got there. It's possible to have the <option>s in a horizontal row - but only on Chrome and Firefox. Here's a quick fiddle showing the results: As you can see, it's […]
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This blog has a calendar showing my yearly archives. It was in a table layout - which made sense when I first designed it - but had a few spacing niggles and was hard to make responsive. Now, it behaves like this: The code is relatively straightforward. The HTML for the calendar looks like this: […]
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I recently saw Robin Moisson's method of password protecting a statically served HTML page. It's quite neat! But it does rely on JavaScript. That got me wondering if there was a way to encrypt a static page only using CSS? And... I think I've done it! I'll warn you now, this is a deeply stupid […]
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A bit of a thought experiment - similar to my Minimum Viable XSS and SVG injection investigations. I recently found a popular website which echoed back user input. It correctly sanitised < to < to prevent any HTML injection. Except… It let through <h2> elements unaltered! Why? I suspect because the output was: <h2>Your search […]
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How do you show two languages simultaneously in HTML? If you want to show text in a foreign language, the markup is simple: <html lang="en-GB"> ... As Caesar said: <i lang="la">veni vidi vici</i> That says the page is in British English (en-GB) but the specific phrase is in Latin (la). But how can you offer […]
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· 0f0 f00 HTML5 notemail · 3 comments · 300 words · read ~152 times.