Console Error Prevention

Question

What is the best approach to prevent errors when console.log calls remain in JavaScript and it runs in browsers without a console or with the console turned off. Is there a way that it can be automatically redefined to become a javascript alert, for example?

Answer 1

if(!window.console) console = {log: function(s) {alert(s);}};

You can, of course, add more features that the console usually has.

Answer 2

, console, typeof, window.console, , , , ReferenceError.

:

if (typeof console == "undefined") {
  window.console = {
    log: function () {
      // do nothing
    }
  };
  console.warn = console.debug = console.log;
} 

Answer 3

Here is what I use: -

if(typeof(console) != "undefined")