The title is pretty self-explanatory..
Is there a way to read whatever's been output to the console.log up until the moment you decide to read it, using Javascript?
1 Answer
You can make a proxy around it, such as :
(function(win){
var ncon = win.console;
var con = win.console = {
backlog: []
};
for(var k in ncon) {
if(typeof ncon[k] === 'function') {
con[k] = (function(fn) {
return function() {
con.backlog.push([new Date(), fn, arguments]);
ncon[fn].apply(ncon, arguments);
};
})(k);
}
}
})(window);
11 Comments
But I have to be quick enough to override the console before some script for example starts using it, otherwise I'll lose whatever that script logged up until the moment I start overriding the console. Also, if a script uses "delete console;" my override will be lost, correct? So I'll need to set an interval to keep overriding the console, hoping that no logs are lost between those intervals, right?
gen_Eric
I don't think you can actually loop over the properties of
console.gen_Eric
@SproutCoder:
delete console; is not a common line of code. If a script did that, I'd be worried what else it was doing. I wouldn't waste your time with an interval. As for being "quick enough", just load this as the 1st script on your page, that way you can be sure it's first.
OneOfOne
for(var k in console) if(typeof console[k] === 'function') console.log(k) seems to work at least in chrome.gen_Eric
@OneOfOne: It wasn't working for me before for some reason. Worked this time :)
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console.logto use an internal queue (and also write-through) - or perhaps look into browser/extension specific support (e.g. any Firebug hook?).