Author here-- really happy that people are finding this useful. I wrote it a few months ago when frustration with the way Chrome logged objects led me into their docs and I found a bunch of cool stuff I hadn't seen before.
two things about the `null` - the "replacer" function
1. in IE 8, it will choke. it needs to be a function (hopefully you don't have to care about IE 8, though)
2. in all other JSON.strigifable browsers, you can skip it with a falsey value, which is what the `null` is doing here. As a result, you can also use `0` (e.g. stringinfy(foo, 0, 2)), which I like because I can type it faster
The console api isn't really linked to chrome. I prefer the chrome debugging tool but those things should work on firefox too. I think you could be clearer on this point.
Don't use that in prod, because it doesn't work in IE and it will cause your js to stop working.
In IE the 'console' object doesn't even exist if the developer tools aren't displayed, so if you use "console.log" in your program, your js will just throw an NPE.
Note that if you try closing the Developer Tools, 'console' is still declared for this page and all descendant pages. To test 'console.log' you need to avoid opening the devtools and open a new tabs.
I don't remember when exactly, but they fixed that at some point. I just ran this simple test in IE (without ever opening the dev tools) and got the alert: http://jsbin.com/hodavocuwu/1/edit
Indeed, all of these are in Firefox, in Nightly at least. Though console.profile and console.profileEnd didn't seem to work? I'm sure someone from FF dev tools will turn up in this thread to clarify.
time/timeEnd, profile/profileEnd all work in Firefox up to Aurora -- current nightly has a new performance tool that will support profile/profileEnd in a few days, and will most definitely have it before uplift to Aurora https://bugzil.la/1077464
Note though it's not `console.copy` but `copy`; it's a part of Command Line API [1] which is not the same as Console API [2] - command line API is not accessible from JS of the page.
in Aurora (Fx39), profile/time tools create profiles and marks on the timeline, but nightly (Fx40) has a combined tool and the profile/profileEnd commands landing soon
watch/unwatch are from Object.prototype, confusingly enough!
the "caveat" about "live" data is only in chrome console.
For example firebug does not have this problem.
Another pet peeve of mine: at the moment, only in firebug I can call console.log() passing a function, get a nice, clickable function definition, that can get me directly to the "debugger" section, at the right place where the function is.
Simple, useful code (uses ES6 syntax) - `console.log({a, b, c, d})`- it's shortcut for `{a: a, b: b, c: c, d: d}` and is less invasive than breakpoint.
