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I started reading this book about Building Progressive Web Apps - O'Reilly (amazon link)[^]. Very interesting -- kind of a hybrid between web app that gives a UX of a native app. Okay, cool.
Then I read about Service Workers...
Read this and keep in mind that these are implemented in JavaScript inside your browser.
Progressive Web Apps Book says A service worker is a script that can be registered to control one or more pages of your site. Once installed, a service worker sits outside of any single browser window or tab.
From this place, a service worker can listen and act on events from all pages under its control. Events such as requests for files from the web can be intercepted, modified, passed on and returned to the page.
This means there is a layer between the page and the web that can respond to request independently of a network connection. A layer that works even if the user is offline. This layer can detect an offline state or slow responses from the server and return cached content.
Keep in mind these Service Workers can run, even if you closed the tab of the web site.
This makes me think of all those times my Chrome browser has gone insane doing stuff and I have no idea what it is doing. I'm not worried about Progressive Web App necessarily doing nefarious stuff --- protected by CORS -- but I am a bit concerned about uninformed web site devs using this functionality to the extreme so that it eats process on my machine simply because I've visited their web site. 
Seems a bit crazy to me.
 Of course, I've only read a couple of chapters and the one (google dev page below) so maybe there's more protection from poorly written code.
You can see the official docs on Service Workers at google's dev site:
Service Workers: an Introduction Web Google Developers[^]
modified 21-Sep-17 16:57pm.
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Not sure but if you read about the
https://torrentfreak.com/the-pirate-bay-website-runs-a-cryptocurrency-miner-170916/
......
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I did read about the hackers running crypto mining code on users browsers and was wondering how they could do that a couple of days ago.
I think you've made the connection.  It probably is these service workers that the hackers are using.
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even the hackers are getting far Progressive .....
http://knowyourmeme.com/memes/events/over-9000-penises
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How often does your get cleaned?
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Hmm. I don't have a travel mug, but I do have one of these[^].
A friend of mine told me the trick to cleaning them and any other stainless steel drink containers: use denture cleansing tablets. My 2 quart thermos takes about a dozen tablets, some warm water, and an overnight soak. I clean it about once a month.
Software Zen: delete this;
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The denture tablets also works for Glass Decanter (wine decanter).
I'd rather be phishing!
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I use OxyClean - works like a charm.
And, generally it gets cleaned when my wife starts going 'ewwwww'
A human being should be able to change a diaper, plan an invasion, butcher a hog, navigate a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects! - Lazarus Long
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If I had one I'd clean it after each use, same as my desk mug.
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Everyday.
I'd rather be phishing!
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I only use it on Saturdays, so once a week. same as the Thermos.
"Go forth into the source" - Neal Morse
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Does a spittoon count?
modified 21-Sep-17 14:03pm.
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Back when I used one, it was once per day used, after the last refill is gone. Can't stand having sticky residue or dried tea/coffee in a mug; makes the next cup taste worse.
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So, how are the negotiations going with the civilization growing in yours? Have you resolved the civil rights concerns yet? 
Software Zen: delete this;
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No civil rights, and they never complain. I'm sure they fear the god that sends a Great Flood their way every day.
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Hmm. I'm re-reading the original Dune series by Frank Herbert (currently on Dune Messiah).
Be careful you don't have a kwisatz haderach[^] in there; they can be all sorts of trouble.
Software Zen: delete this;
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No chance I m the Slobadan Milosovic type, awaiting US & NATO Air Strikes!!
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Tha's yuck, but still not as bad as the spittoon thing.
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Travel mug: end of the trip (depending on location, that may be a couple of days)
Work mug: when I get around to it, maybe once a week, but I drink multiple cups of coffee per day from it.
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I don't have a travel mug, but I do drink out of different coffee mugs and tea cups every day. I wash them out after I finish the drink (or may be an hour later if I'm in the middle of something).
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Right after finishing the drink.
"It is easy to decipher extraterrestrial signals after deciphering Javascript and VB6 themselves.", ISanti[ ^]
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What is a travel mug? Must be one of this American things.
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