CODEWITHSUNDEEP
javascriptconsolefirebug
Radu M.
Radu M.

Reputation: 5738

js override console.log if not defined

Which solution do you recommend, the second is simpler ( less code ), but there are drawbacks on using it ?

First: (Set a global debug flag)

// the first line of code
var debug = true;
try {
    console.log
} catch(e) {
    if(e) {
        debug=false;
    }
};
// Then later in the code
if(debug) {
    console.log(something);
}

Second: override console.log

try {
    console.log
} catch(e) {
    if (e) {
        console.log = function() {}
    }
};
// And all you need to do in the code is
console.log(something);

Upvotes: 28

Views: 36063

Answers (7)

Suresh
Suresh

Reputation: 923

I've faced a similar bug in my past, and I overcame it with the code below:

if(!window.console) {
    var console = {
        log : function(){},
        warn : function(){},
        error : function(){},
        time : function(){},
        timeEnd : function(){}
    }
}

Upvotes: 1

Sean
Sean

Reputation: 789

window.console = window.console || {};
window.console.log = window.console.log || function() {};

Upvotes: 0

Frankie
Frankie

Reputation: 25165

EDIT: Andy's answer is way more elegant than the quick hack I've posted below.

I generally use this approach...

// prevent console errors on browsers without firebug
if (!window.console) {
    window.console = {};
    window.console.log = function(){};
}

Upvotes: 3

Mike Kormendy
Mike Kormendy

Reputation: 3475

The following will achieve what you are looking for:

window.console && console.log('foo');

Upvotes: 0

David
David

Reputation: 3441

I came across this post, which is similar to the other answers:

http://jennyandlih.com/resolved-logging-firebug-console-breaks-ie

Upvotes: 0

Jameson Quinn
Jameson Quinn

Reputation: 1058

Or, in coffeescript:

window.console ?=
    log:-> #patch so console.log() never causes error even in IE.

Upvotes: 6

Andy E
Andy E

Reputation: 344685

Neither, but a variation of the second. Lose the try...catch and check for existence of the console object properly:

if (typeof console == "undefined") {
    window.console = {
        log: function () {}
    };
}

console.log("whatever");

Upvotes: 56

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