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Last week I was writing and testing my Single Page App on multiple platforms and browsers:
* Android h/w (Lollipop) running Chrome -- My phone
* Android emulated (Nougat) running Chrome -- worked as expected
* Android Lollipop emulated running default browser
* Kindle Fire tablet h/w running (default) Silk browser -- intermittently flaky
* iPad Mini h/w running Safari -- worked perfectly
* iPhone emulated on Mac Mini running Safari -- worked perfectly
* Current desktop FireFox -- always worked
* Current desktop Chrome -- always worked
* Current desktop Edge -- always worked
At various times I was successful in getting it to run on various platforms and browsers.
The main issue was that The Desktop Browsers always worked as expected. It was a trick.
I also found that Safari browsers always seemed to work.
However, I could never get it to work on my phone running lollipop and Chrome.
It was driving me crazy.
Reload JS
You know, even on a dekstop browser you can do a force refresh 10 times and the underlying changed JS file doesn't actually refresh. Instead you have to load the JS directly and refresh it to get it to refresh. Sheesh.
Cache?
I always thought it was browser cache not showing me the current javascript and I was often correct.
However, testing this on a phone is a pain. I would go directly to the .js file via the browser on the phone and could see that the JS had not updated. I would do a refresh and could only assume the main page using the JS had updated. However, I later learned it was running a previous version.
This went on for days. 
It is all so painful.
9 Year Old Post
I read this 9 year old post about this issue, which provides a way to handle this:
caching - When does browser automatically clear cache of external JavaScript file? - Stack Overflow[^]
But, even on that post on accepted answer someone says:
commentor said This isn't bulletproof though, some proxy servers include query parameters as a part of the cache. The best solution is to add the timestamp or the version to the file name. On my site, I generate a 7 digit checksum of the file at build time, so if anything changes in the file a new checksum is generated, the file is renamed, and thus the browser knows to download the updated file.
Wow...just wow.
Testing on various browsers (especially mobile) is terrible.
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I see JavaScript as a life sentence for those who are too dumb to understand a pointer.
Edit: That also means that there is hope for the rest!
I have lived with several Zen masters - all of them were cats.
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CodeWraith wrote: JavaScript as a life sentence
Yeah, I originally started in C/C++ also and I will always have a fondness for those languages.
The Browser is The OS now though. 
And, in this case, it is really the challenges of the browser itself -- since it does the caching -- and not really JavaScript's fault this time. But, I do like making JavaScript the scapegoat. 
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Ok, then browsers, HTML and JavaScript and PHP are deserved punishment for sins one has commited in another life.
I have lived with several Zen masters - all of them were cats.
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CodeWraith wrote: browsers, HTML and JavaScript
And, yet, without them, you wouldn't have been able to post this message.
The irony! The paradox! 
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Really? I write native clients wherever I can. Actually, they are not native at all. They run anywhere we have a .Net framework.
I have lived with several Zen masters - all of them were cats.
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CodeWraith wrote: Really? I write native clients
Have you done a "view source" on this CP page? That's what I mean. 
CP is browser-based HTML, JS, etc. Mine was a poorly executed joke. 
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Funeral will be held tomorrow morning at 8:00, 8:05, 8:10 and 8:15!
Getting my coat already, calm down! 
Anything that is unrelated to elephants is irrelephant
Anonymous
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The problem with quotes on the internet is that you can never tell if they're genuine
Winston Churchill, 1944
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I'd just like a chance to prove that money can't make me happy.
Me, all the time
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I credit my snooze alarm with my amazing ability to easily add 9 to any value in my head.
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Wow! 5 minute snoozes. My alarm only does 15 minutes. How is he supposed to get any final rest?
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Snooze is actually every nine minutes. If you're gonna try to be funny, use technically correct values so programmers don't get distracted by requirements and use cases.
".45 ACP - because shooting twice is just silly" - JSOP, 2010
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You can never have too much ammo - unless you're swimming, or on fire. - JSOP, 2010
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When you pry the gun from my cold dead hands, be careful - the barrel will be very hot. - JSOP, 2013
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My clock can be set to 5 and 10 minutes snooze intervals. I've never figured out the reason for the 9 minutes... 
And how can you accuse me of trying to be funny when some poor bloke has just died? 
Anything that is unrelated to elephants is irrelephant
Anonymous
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The problem with quotes on the internet is that you can never tell if they're genuine
Winston Churchill, 1944
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I'd just like a chance to prove that money can't make me happy.
Me, all the time
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You can google it, but I'll tell you.
Back in the 50's when "snooze" was invented, clocks had already long been standardized in terms of internal gears. To avoid significant redesign of pretty much every alarm clock on the planet, manufacturers could choose between just over nine minutes, or just over ten minutes. Someone somewhere did a study that found that snoozing for 10 minutes was enough time to fall back into a deeper sleep, so they chose nine minutes, assuming it would be a more pleasurable experience.
Nowadays, digital clocks can have their snooze time adjusted (like on the iPad, or your cel phone, for instance), but their default snooze times are still nine minutes.
".45 ACP - because shooting twice is just silly" - JSOP, 2010
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You can never have too much ammo - unless you're swimming, or on fire. - JSOP, 2010
-----
When you pry the gun from my cold dead hands, be careful - the barrel will be very hot. - JSOP, 2013
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Johnny J. wrote: I've never figured out the reason for the 9 minutes...
Apparently...
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Unguided missiles such as Ed Shaver, E.G. Horn and Uba Laya perhaps. (16, 2 words)
98.4% of statistics are made up on the spot.
modified 23-Oct-17 10:49am.
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So is it two words 16,2 ?
We can’t stop here, this is bat country - Hunter S Thompson RIP
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It's two words totaling 16 chars (it's actually 8,8 if anyone prefers it that way).
98.4% of statistics are made up on the spot.
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Traditionally, that would be "(8, 8)" not "16, 2 words".
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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It depends entirely on the publication - The Times would use (8,8) whereas The Spectator would use (16, two words).
98.4% of statistics are made up on the spot.
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Actually The Spectator would use "(16 two words)". See 21 October issue, page 59. 
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So it does. maybe it's Inquisitor that uses my format.
98.4% of statistics are made up on the spot.
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A.N.Tam and Lymouth Rock could also be examples.
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Im running round like a headless chicken here
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leghorn
cubalaya
Are types of Chicken - without their heads.
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They are, indeed.
The other one, in the highly unlikely event that anyone was wondering, is a red shaver.
98.4% of statistics are made up on the spot.
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