This question is related to my earlier question How to Debug Javascript in IOS Action App Extension. Basically, I am developing an mobile safari extension, and part of the work is to develop a javascript (operating on top of "document" provided by mobile safari) to run inside the app extension.
However, I have not found a way to debug a javascript file inside an app extension. Now, I am trying to ask the question a bit differently - given mobile safari on a page, can I somehow run an external javascript on that page and debug this external javascript? I suppose that Safari Web Inspector could help with that? Thanks.
(This is a slightly customized answer from your other question)
The official documentation for this is [here][1].
It's not too hard, although recently I've had an issue with the page showing up when connected to the iOS simulator. In that case I just ended up using my phone directly. (Apparently you need to start desktop Safari after the iOS Simulator has started to inspect "remote" Simulator sessions)
Ensure that on the device Settings->Safari->Advanced->Web Inspector is on.
(Make sure you've Trusted the computer from the device)
Start MobileSafari on your device.
Start Safari on your desktop, make sure Show Develop menu in menu bar is on in Preferences.
In the Develop menu you will see your device name, say 'BSharer's iPhone'.
select the page name underneath your device name, say 'en.m.wikipedia.org - Wikipedia'.
You are now debugging that device's page on your desktop. The developer page will open and you can debug as if it was running on the desktop machine. You should now see all the JavaScript that is available to that page and set breakpoints.
(The app extension requires the debugger; statement because we don't see the javascript files injected by the app extension. You can still use the debugger statement but it's not usually necessary.)
Related
I have a web application which is build to run on mobile devices with any browser. but there are two links which I want to open in specific browser which is say Safari.
I think this might be what you need - application:openURL:options:
I've only glanced at the doc but it seems you can choose a particular app to handle a URL.
I am creating a purely browser based app - HTML and JavaScript.
I do not have an Android IDE installed (nor one for iOS) - and would prefer not to have to install one and perform remote debugging.
Developing on my PC, I use the Chrome browser and the developer tools to view the JavaScript console in order to debug.
How can I do that on an Android tablet (or, later, iOS)? I prefer a purely browser based solution, but could accept an Android/iOS based app.
Try https://github.com/liriliri/eruda
All you need to do is add this snippet on top of the page:
<script src="https://cdn.jsdelivr.net/npm/eruda"></script>
<script>eruda.init();</script>
And you get an interactive set of developer tools similar to those in Chrome and Firefox. Here's a screenshot:
Just released for iOS, Chrome 73 now supports the option to see console.log.
If you’re a website developer, you can now view JavaScript console
messages. Navigate to chrome://inspect to enable, then perform desired
actions in another tab. Switch back to the same chrome://inspect tab
to view any printed JavaScript console logs.
see here in "What's New" section or in "version history" 73.x version.
For Android you can use remote debugging through chrome as described here
I'll summarize/rewrite the steps (for browser based debugging) here in case the link ever goes down.
Requirements:
For browser tabs: Android 4.0+ and Chrome for Android
A USB cable to plug in your Android device
Chrome 32 or later installed on your development machine
Set up:
Enable USB debugging on your device.
Navigate to chrome://inspect/#devices on your desktop Chrome browser. (Alternatively, to get to the same screen, you can select Chrome menu > Tools > Inspect Devices)
After connecting, you may see an alert on the device requesting permission for USB debugging from your computer. Tap OK
Chrome should now display the connected device
Open up chrome on your Android device and navigate to the page you want to debug/inspect. The page should show up on your desktop browser and you should be able to inspect it.
If for some reason you have an older version of chrome and cannot upgrade. There is a plugin that you can install to accomplish the same thing.
I was searching for a while for something like this. Firebug Lite used to be an option but has been abandoned. Before discovering eruda (as mentioned elsewhere in this thread), I developed my own open source console. It's pretty light on features, but it does the main things - capture JS errors, and allow you to run commands to inspect variables and object on your page.
Here's a demo:
It's activated by just placing this script tag on your page:
<script src="https://cdn.jsdelivr.net/gh/SimonEast/MiniConsoleJS#main/console.js"></script>
Open source, GPL licence. Available at: https://github.com/SimonEast/MiniConsoleJS/
Guys I build a website and when i am accessing it from the android browser(Default) A script that is very important on the functionality of my website is not being displayed. But when I am accessing it from the android google chrome browser the script is being displayed as I was expected to see.
My site is responsive, it adapted to the screen of the user.
I am using galaxy note 2 and the android version is 4.3.
I was thinking to build an android application such as a browser that is going to be always fullscreen and locked on my site but i do not what google chrome browser has and making my website as I want it to be.
Any help?
I'm not sure what you mean by Android Browser (default). Is there a Samsung Browser already preinstalled on the phone that isn't Chrome?
My guess, off the top of my head, is that JavaScript is disabled on this other browser. If you were to create your own browser with an Android WebView, JavaScript is disabled by default and must be manually set to true.
A quick Google search for 'Samsung Note JavaScript' doesn't return anything readily apparent, but here are a few different Samsung Models with directions on how to enable JavaScript on their browsers. I would imagine the process is similar for the Note 2.
http://support.t-mobile.com/docs/DOC-6782
http://www.droidista.com/2014/06/enabledisable-javascript-on-samsung.html
http://www.att.com/esupport/article.jsp?sid=KB117209&cv=820#fbid=omMGs_GnNUf
I have seen several posts that talk about remote debugging of javascript code on Android, but they all miss the point of what I am trying to do.
I have a Nexus 7 and I want to use it as a remote development environment when I am away from my desktop. I have created a chrooted debian distribution to run apache and php and git (via ssh). This chrooted environment mounts a subdirectory of the /sdcard directory from outside the chroot environement. Apache document root of a virtual host is pointing at a directory within this. Before leaving the desktop I can git push the latest release to the tablet. When I return git pull can get what I have done back again.
I then (when away from home and NOT connected to any network) can edit the code using an Android editor (using the 920 text editor), but then run the browser to look at what I have developed using localhost the apache virtual host picks this up and displays it.
The application I am developing IS NOT FOR ANDROID - it is ultimately for the desktop. But I want to be able to debug it like I was on the desktop. Breakpoints and single stepping are the prime thing, but also I tend to use the html section in firebug to adjust my CSS before editing it.
Is there a way to get either the chrome developer tools or firebug add on for firefox to load into a browser that will run in android?
I use Firebug lite bookmarklet for iPhone and iPad, never tried on Android, check this out http://martinkool.com/post/13629963755/firebug-on-ipad-and-iphone it must be similar on Android.
To activate it use this steps:
Create a new bookmark or bookmark a page
Rename the bookmark to “Firebug”
Copy the textarea link:
javascript:(function(F,i,r,e,b,u,g,L,I,T,E){if(F.getElementById(b))return;E=F[i+'NS']&&F.documentElement.namespaceURI;E=E?Fi+'NS':Fi;Er;Er;Er;(Fe[0]||Fe[0]).appendChild(E);E=new%20Image;Er;})(document,'createElement','setAttribute','getElementsByTagName','FirebugLite','4','firebug-lite.js','releases/lite/latest/skin/xp/sprite.png','https://getfirebug.com/','#startOpened');
Edit the Firebug bookmarklet, remove the URL and paste the
bookmarklet
Choose “Done” (on the virtual keyboard) and you’re all set
Hitting that bookmarklet should give you a fully functioning Firebug at the bottom of your mobile device.
At least not for Firefox Mobile, because all the devtools are still partially based on XUL, where the Firefox Mobile is using Native UI.
I don't think there is any plan in the close future to change this situation; it's not a common scenario.
However, you should be able to do something using the Debugger API, creating an add-on for Firefox Mobile. But I don't know if it's worthy.
I'm trying to debug a problem that only occurs when I access a mobile website from a mobile browser. I strongly suspect that the root cause of the problem is due to caching that occurs when you access the same page several times.
I can reproduce the problem consistently when I access the page from my Android phone, but if I use a desktop browser the problem never occurs.
Because I can't use any developer tools on my Android phone, I really need to reproduce the problem from a desktop browser, so that I've some way of debugging into it. I've already tried using both Firefox and Chrome with an appropriate setting of the User-Agent header (so that the mobile version of the site is displayed), but that doesn't work.
Is there a better way to emulate the behaviour of a mobile browser from the desktop, in a manner that allows the client-side code can be debugged? FWIW, I'm fairly confident that I could also reproduce the problem on an iPhone, but don't have one available.
You can use a debugger on your phone, using chrome debugger.
Nowadays, you can just navigate to chrome://inspect/#devices after plugging your device in.
If that doesn't work, you can use the old method:
Connect your mobile device to the host using a USB cable
On the mobile device, launch Chrome. Open Settings > Advanced > Developer tools and check the Enable USB Web debugging option
Issue the following command in the console on your host machine to enable port forwarding:
adb forward tcp:9222 localabstract:chrome_devtools_remote
Open desktop Chrome and navigate to localhost:9222
Choose the page you need to debug
You can now start debugging and profiling mobile content in the Developer Tools on your desktop