https://polosbn.bnnonline.it/SebinaOpac/sebinayou/js/sy/1.01.Console.js

1(function() {
2
3  var methods = [
4    "log",
5    "debug",
6    "info",
7    "warn",
8    "error",
9    "assert",
10    "clear",
11    "dir",
12    "dirxml",
13    "trace",
14    "group",
15    "groupCollapsed",
16    "groupEnd",
17    "time",
18    "timeEnd",
19    "timeStamp",
20    "profile",
21    "profileEnd",
22    "count",
23    "exception",
24    "table"
25  ];
26
27  if (!window.console) {
28    window.console = {};
29  }
30
31  function dummy() {}
32
33  for (var i = 0; i < methods.length; i++) {
34    if (!window.console[methods[i]]) {
35      window.console[methods[i]] = dummy;
36    }
37  }
38
39  function _fn(method) {
40    return function(error) {
41      if (!window.console ||
42          !window.console[method]) {
43        return;
44      }
45      window.console[method](error);
46    };
47  }
48
49  window.log = {};
50  for (i = 0; i < methods.length; i++) {
51    window.log[methods[i]] = _fn(methods[i]);
52  }
53
54}());