Detect user's OS and rearrange/style download links [closed] - javascript

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I have a website for an application I've developed, which is compiled for a variety of operating systems. On the downloads page, I would like to have it arranged so that the download link for the user's OS is at the top with a big obvious "Download!" button, with the other options listed below in plainer links. How can I do this?

When you log window in Mozilla's developer console you can see all the properties of window, this is quite useful and fun to find new things.
When I did so there is a property called navigator, and within that platform.
So, since I was running Linux when I did this, the value of window.navigator.platform was equal to "Linux".
One easy way you could do this is:
document.getElementById("download_btn").setAttribute("href","downloads/package_" + window.navigator.platform + ".zip");
So, if I were to download it off your site, I would download the file "package_Linux.zip".

Type navigator in your javascript console and check out all the goodies you have access to. In particular, userAgent and platform.
Combine that with some regex matches and the help of user agent strings list and you're good to go.

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Disable the Fn+ F12 keys in the browser using Java script [closed]

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I'm rendering one PDF in my website using the Canvas so that the user can view but not download. I have disabled the right click and the disable the download button and disable the printout too on any of the browsers. However there are still ways to get into the F12 mode and get the PDF downloaded. IF any one can help to achieve my logic to disable the developer mode on that particular webpage.
Thanks in advance.
Even if you could, it won't matter.
The pdf document data, unless generated by your client, has been downloaded, which means even if a website had control over a client's dev tools (which it does not), the client could just intercept all the packages containing your file going to his machine.

Where are websites html/js stored on local computer, in chrome, windows 10? [closed]

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When typing some url, e.g www.google.com (or www.news.com or any other), some client-side code gets downloaded to my local machine, so that the browser can display and run whatever is in there.
I would like to look at that code and maybe slightly modify it.
My google searches failed, probably because I am unfamiliar with the correct terminology for what I am searching. I wasn't even sure about which tags to put on this question.
Where are websites client-side files stored locally? Specifically on chrome, windows 10
If you want to view and edit at the source of the page you're currently looking at, and have your changes reflected in the page immediately, use the browser developer tools (this will be much better than "View source", as it will interpret any clientside DOM generation, give you a collapsible, edited, nested-list view of the DOM, etc).
If you want to make changes that would persist, i.e. every time you view a particular website your changes will be applied to it automatically, then you're looking at building yourself a browser extension, either for your specific browser or cross-browser.
Browsers don't, as far as I know, store the source of a page during render on disk in any way that can be viewed or usefully modified.

show live TV from a connectted USB DVB-T stick (on windows) on a local web page [closed]

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I want to buy a DVB-T stick which gets connect to PC and laptop by USB and has a software to play live TV on windows. What I want to do with that is to show the live TV stream from that stick on a web browser instead of the original windows software. The reason behind that is I need to use it in a digital signage program which only supports web platform for these kind of medias.
As far as I know, if I could make a html page which contains the player to show the live stream from the USB stick, the job is done, but my question is how to write that html page exactly. Any suggestion?
Thanks for paying attention to my question and helping me in advance.
This is not possible with HTML. Also PHP and JavaScript will not fit this problem. Because that are web based languages. You can not access plugin devices in any way.
The only way you can do is to write an application in C#/C++/Java which will read the usb and open it in a webview to show.

Free Basics Platform(internet.org) [closed]

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Free Basics has a policy that you need to disable Javascript code in your website now I have a desktop version website and I want to register it on Free Basics platform should I responsive the same website and disable or hide the Javascript using some Php scripts or css or I have to make a new responsive website with not even a single line of Javascript code?
help will be much appreciated thanks
I was intrigued and looked at their technical guidelines - did you read those?
https://developers.facebook.com/docs/internet-org/platform-technical-guidelines
You have to have a site that is specifically designed to work on a low-end devices which are not capable (among other things) to run javascript. While you may detect javascript capability, other requirements of this platform are not easily detected, such as the requirement for smaller image sizes etc. After all, the target users for this applications might be in the area where 20 y/o computer on 9kbps modem is considered to be a good machine.
So I'd say that to pass their technical evaluation you will have to create a separate site, that is targeting their needs.

Is there any possibility to insert my own javascript code into any website? [closed]

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Imagine a website - for example YouTube. In every video I'd like to insert a link next to the title that will point to my website, and if I click it, it grabs the url and sends it to my site's database.
I've seen somewhere such a possibility (I don't remember where), consisted of the fact that you dragged a *.js file onto your browser window and it worked locally just for you in the browser like an extension to existing site or sth.
Can you point me to articles or other resources if this is possible?
You have a couple options:
You can use a browser extension such as Greasemonkey for Firefox, or Tampermonkey for Chrome.
Write a Bookmarklet.

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