How to quickly and conveniently disable all console.log statements in my code?

Question

Is there any way to turn off all console.log statements in my JavaScript code, for testing purposes?

Answer 1

I have used winston logger earlier.

Nowadays I am using below simpler code from experience:

1. Set the environment variable from cmd/ command line (on Windows):

   cmd
   setx LOG_LEVEL info
   

Or, you could have a variable in your code if you like, but above is better.

2. Restart cmd/ command line, or, IDE/ editor like Netbeans

3. Have below like code:

   console.debug = console.log;   // define debug function
   console.silly = console.log;   // define silly function
   
   switch (process.env.LOG_LEVEL) {
       case 'debug':
       case 'silly':
           // print everything
           break;
   
       case 'dir':
       case 'log':
           console.debug = function () {};
           console.silly = function () {};
           break;
   
       case 'info':
           console.debug = function () {};
           console.silly = function () {};
           console.dir = function () {};
           console.log = function () {};
           break;
   
       case 'trace':   // similar to error, both may print stack trace/ frames
       case 'warn':    // since warn() function is an alias for error()
       case 'error':
           console.debug = function () {};
           console.silly = function () {};
           console.dir = function () {};
           console.log = function () {};
           console.info = function () {};
           break;
   }
   

4. Now use all console.* as below:

   console.error(' this is a error message '); // will print
   console.warn(' this is a warn message '); // will print
   console.trace(' this is a trace message '); // will print
   console.info(' this is a info message '); // will print, LOG_LEVEL is set to this
   
   console.log(' this is a log message '); // will NOT print
   console.dir(' this is a dir message '); // will NOT print
   console.silly(' this is a silly message '); // will NOT print
   console.debug(' this is a debug message '); // will NOT print
   

Now, based on your LOG_LEVEL settings made in the point 1 (like, setx LOG_LEVEL log and restart command line), some of the above will print, others won't print

Hope that helped.