Is there a way in JavaScript or Visual Studio to identify if the code is being used in debug-mode? Is there an equivalent of "#if DEBUG" in C# for tracking debugging status?
Is there a way in JavaScript or Visual Studio to identify if the code is being used in debug-mode? Is there an equivalent of "#if DEBUG" in C# for tracking debugging status?
After some trial and error, I finally found a solution that worked for my project.
In my main JavaScript file, I added the line:
Site.DEBUG = false;
This allowed me to check for this constant in the code. However, I needed to automate setting this value at build time according to the project configuration. That's when I discovered a helpful command-line tool called fnr.exe for find and replace operations in files. It turned out to be quite useful.
To implement this automation, I created a folder named BuildScripts in the project directory, copied the fnr.exe file into it, and wrote a batch file like this:
switch_client_debug.bat
REM Params: path to folder, filename, change-DEBUG-from-this, to-this
fnr.exe --cl --dir "%1" --fileMask "%2" --caseSensitive --showEncoding --find "DEBUG = %3" --replace "DEBUG = %4"
Then, I set up pre-build events for the web project like this:
cd $(ProjectDir)BuildScripts
call switch_client_debug.bat $(ProjectDir)ts site.ts false true
And for Release configuration:
cd $(ProjectDir)BuildScripts
call switch_client_debug.bat $(ProjectDir)ts site.ts true false
This setup now allows me to easily manage logging, tracing, and specific logic based on Debug or Release configurations in my JavaScript code.
Incorrect.
#if/#endif are preprocessor commands in C++ (and other programming languages) which direct the compiler to selectively include or exclude certain code segments during compilation.
Since JavaScript is an interpreted language and not compiled beforehand, implementing preprocessor directives like these would be impractical.
Specifically for Internet Explorer, there is a unique conditional compilation technique:
/*@cc_on
@set @version = @_jscript_version
@if (@_win32)
document.write("You are using 32-bit IE " + @version);
@elif (@win_16)
document.write("You are using 16-bit IE " + @version);
@else @*/
document.write("You are using a different browser or an older version of IE.");
/*@end @*/
It's a little later, but I stumbled upon something similar today.
If your conditional statements can fit on one line (like console.log, for example), you can try the following approach:
Start by adding "//#IFDEBUG" before all your debug lines, such as
//#IFDEBUG console.log('show debug message here');During build or compression, these commented lines will be removed and won't affect anything.
When you need to debug, simply replace "//#IFDEBUG " with "/*@IFDEBUG*/ "
Now the debug lines will be active when the script is executed.
Once you're done with debugging, switch back by replacing "/*#IFDEBUG*/ " with "//#IFDEBUG "
Arriving fashionably late to the gathering, I'll share my approach on Visual Studio
// #region Activate this section during debug mode
// localStorage.clear();
// #endregion
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