Since I installed Visual Studio 2010 from scratch about 2 months ago, it behaves slightly different when debugging JavaScript code being run in IE.
When I set a breakpoint, it opens a duplicate of the view with the term "[dynamic]" in the header and marks the breakpoint in there.
When a JavaScript error happens during execution, it does the same before it marks the line of code that threw the error.
This "dynamic" view is editable but edits have no effect - they are not saved to the file.
I find this behavior pretty uncomfortable. Everytime I notice an error in the code during debugging, I happen to fix it in the dynamic view. I hit save. VS does not complain. Next I refresh the page in IE, and - bang - the changes are lost, it loads the untouched old version again.
I haven't been able to find out how I can turn these views off. Before I re-installed Visual Studio it did not do that. It would only create "dynamic" views for script found in inline script tags in HTML files.
Try this
IE > Internet Options > Settings (under browsing history) > Check for new version of stored pages : Every time I visit the webpage.
This works for me in IE10.
Other option is to open Developer tools and select cache option Always Refresh from Server as show in the image below
Try hitting CTRL+F5 on the web page. That did the trick for me.
The problem was that I had opened other IE windows from a previous debugging session, so the dynamic javascript files were still cached.
Having developer tools open - F12 - should also cause the cache files for the page to be cleared on each refresh.
Changing the encoding of the JS file in question, from a Windows codepage to UTF-8, fixes this for me.
Narrowing it down, it appears that OEM Extended ASCII characters in the file (e.g. ALT-254 which I use for a bullet) trigger the problem with the Windows codepage files.
(Visual Studio 2013 Update 5, IE11)
For Google Chrome:
Open developer tools(F12)
Open Network Conditions Tool
Select Disable Cache
I had the same problem of not being able to hit a break point in new code. And breakpoints on old code in the same page will bring up the [dynamic] version. The edited page is not reloaded. This just started for me a week ago in both VS2012 and VS2013. Using refresh page and/or Ctl-F5 did not work for me. BUT, reading this thread pointed me to using F12 to open Developer tools. Leaving that window open, while hitting refresh does the trick. Thanks guys.
1) Run the page Without Debugging (Debug-->Start Without Debugging)
2) While the web page is open in Internet Explorer, press Ctrl-F5 so
that the IE cache is cleared. Ensure IE has the focus.
3) Close IE and re-run the page with Debugging (Debug-->Start
Debugging).
This fixed the issue for me.
Related
I'm all setup to debug JavaScript in PhpStorm, however, clicking the 'Debug' button in PhpStorm each time stinks. Is there anyway, maybe a Chrome extension, that I can use to enable debugging with from within the browser? (Just like you would while Xdebug debugging with the Chrome Xdebug helper?)
For example.. I'm working on a large project and need to debug site.com/some/thing/here, PhpStorm JavaScript debugging is setup for my site url (site.com), I have to click 'Debug' in PhpStorm, and a new Chrome tab opens to site.com. I then need to navigate to the page in question before my breakpoint will trigger; and I end up with a ton of tabs in Chrome. That workflow stinks :(
I'd much rather stay in one tab, navigate to the page in question, enable 'debugging mode', set my breakpoint in PhpStorm, and do a JS action or refresh the page to start debugging (just as you would with Xdebug).
I use the Chrome step-through debugger a lot, but I really want to move to using PhpStorm so I'm able to set breakpoints and edit my code in the same place / with the same workflow I use to debug PHP.
Any ideas? Suggestions? Thank you!!
In the URL box, just enter the URL of the page you're debugging (e.g. http://example.com/some/thing/here)
When you click the debug button it will navigate to that page. You can then just refresh the same page
I'm working on some dashing widgets in a dashboard project.
Normally if I work on a coffeescript and I save it, I have to reload the page in the browser, and I can see the effect of my changes in the widget.
For some time the change won't do any effect in the browser. I thought, it may be a browser cache issue and I tried clear the cache, but nothing changed. I tried another browser, same issue.
I can see my changes in the browser only if I change the classname off the widget.
Is there any simpler method?
I encountered a similar issue. The widget would not refresh to reflect my html changes (new <h2> tag). Restarting / clear-cache were the first things I tried. I use Chrome and I found this note in the Dashing-Workshop :
Note: Chrome is sometimes weird, and it's possible that your browser isn't showing the number anymore in the widget. If that's the case load dashing in a brand new tab to clear the cache.
I resolved my issue by turning off caching "Developer Tools > Networking > Disable cache [x]"
It shall work, Use chrome developer tool to debug it
console.log to print to console
use inspect element to see the html/css
Visual Studio 2012 comes with the very nice Page Inspector. I like it! Problem though, I haven't found how (if?) I can turn on JavaScript debugging. Could someone point me in the right direction?
In IE9 (only one time): Tools > Internet Options > Advanced tab > In Browsing category > Clear "Disable script debugging" check boxes (both) > restart IE.
In VS 2012: Run the Page Inspector ( when javascript error box opens, click No ! )
Choose from VS menu: DEBUG > Attach to process...
Select "WebBrowserServer.exe" and click Attach
In Page Inspector window click the Refresh icon.
Debugging works pretty well, but it's one condition. Don't insert any breakpoints in your code (or clear them before - DEBUG > Delete All Breakpoints). There can cause a lot of problems - from hanging and frozing to entirely crashing your VS.
Until this week, I was able to carry debugging of JavaScript in Visual Studio 2012 merely by entering "debugger" in the JavaScript function which acted as a breakpoint, and was able to step through the JavaScript code in the Visual Studio window just the same as the C# code. I did this for the past 11 months until 1 week ago. I made no changes to the default installed settings.
This was the solution suggested in the Asp.Net Forums by Rion Williams. http://forums.asp.net/t/1984115.aspx?Debugging+Javascript+in+MVC And as stated it has allowed me to properly step through my code for the last 11 months.
So, I have a script called "engine", and after much headbashing and (futile) debugging, I've found out that GC simply isn't reloading it!
This is how I include it in the webpage (inside the <head> element):
<script type="text/javascript" src="engine.js"></script>
When a put 10 console.log("asdf");'s at the start of the script, it's like they aren't there. When I went to the "resources" tab in the GC console, I saw that no changes are being applied whatsoever to that script! Hlep? Would putting a + "?" + new Date() at the end help?
The universal solution that works in Chrome, Firefox and IE is cleaning the cache via Ctrl+Shift+Del (on Mac ⌘+Shift+⌫).
Chrome solution #1
Open Developer Tools (F12 or ⌘+⌥+i, or right-click → Inspect).
Select the Network tab and tick the Disable cache checkbox.
Reload the page.
❗️Note: The cache will be disabled only when the devtools window is open.
Chrome solution #2
This only makes sense if #1 is not used.
Open Developer Tools.
Click the Settings cogwheel icon in the bottom right corner.
In the dialog that appears, select under the Network subsection the Disable cache checkbox: from now on the cache will be skipped when the devtools window is open. When the devtools windows is closed caching will work as usual.
Chrome solution #3: empty cache + hard reload
Open Developer Tools (otherwise the menu in the next step won't show).
Click and hold down the Refresh button, and then select from the dropdown Empty Cache and Hard Reload.
Modifying javascript code
A browser-agnostic solution which could be used for debugging is to append in your server-side code a randomly-generated version string as a query parameter, i.e. call your script as:
<script type="text/javascript" src="myscript.js?ver=12345"></script>
This trick will force the browser to reload the script when the value of the ver parameter changes. If you make ajax requests then you can append "?ver=" + new Date().getTime() to your URL.
NOTE: Don't forget to remove the parameter when you are finished debugging because in production you most likely do want the scripts to be cached. It is a common practice though to generate a new timestamp on each new build — this can be used in production, and will ensure that after a new deployment the clients will always get the updated scripts.
Unlike all the above solutions this one will work even when you have some sort of caching (e.g. redis, memcached, varnish) or CDN (e.g. akamai, cloudflare, cloudfront, etc) between the client and the server.
It is possible that the script is cached so the old version is loading from cache. If you want to make sure you get a new version, you can force a browser reload, clear your browser cache or change the name of the script or put a different query parameter on the end of the filename.
This bugged me as well; CTRL+F5 or SHIFT+F5 never worked...
The only things that works is opening your dev tools (hit F12), and right-click the reload icon next to the address bar and then selecting either "Hard Reload" or "Empty Cache and Hard Reload"
As I said in the comment I guess it's a cache problem, a CTRL+F5 should be enough, in case it is not go for CTRL+SHIFT+CANC and clear browsing data. However sometimes it's the server that has some kind of cache, I say that because with IBM WebSphere I often get cache problems that I can't resolve with a simple F5 on my browser. I just have to wait for my web server to "refresh" itself.
In the latest chrome stable 21st Oct 2016.
Open Developer Tools (F12 or right-click > Inspect or vertical ellipsis icon in address bar right corner > More Tools > Developer Tools).
Click the vertical ellipsis icon in the top right corner of Developer Tools navigation bar > settings.
In the Preferences section find the Network > Disable cache.
I am using javascript for an ascx control in my application.
I am getting some errors and want to debug the same.
I have put the debugger in my javascript and unchecked disable script debugging for internet explorer.
When my script is getting executed, I get the debugger launched, and when I attach the javascript (here it is in a separate file ), There is a message as,
There is no source code available for the current location.
What could be going wrong here.
I hope to get some tips on debugging javascript with ascx control
To debug Javacript embedded in a ascx control, you can use chrome explorer.
Here is the step.
Open the page that has the user control in it.
Press F12 on that page.
go to Sources in the "DevTools"
Find pages in the "Sources" tab
click on the page name that you are debugging.
you will see the source code in the middle pane.
your user control javascript is included in the page's source code, this is the key.
use Ctrl + F to find that javascript by the method name you want to debug
add breakpoints to that method and debug
Hope it helps.
To debug JavaScript, Hit f12 in your browser. This will open the developer tools in most browsers. (with Firefox, this assumes you've already installed firebug, which has to be installed separately as an add-on.)
Select the script tab, set your break points by clicking the margin to the left of the line of code where you want to break. If you are using IE, click "start debugging". Then perform an action on your page that will trigger your code. Happy debugging.