Difference between console.log() and console.debug

问题:

Google has not been helpful for me, since searching for "console.debug" just brings up a bunch of pages that have the words "console" and "debug" on them.

I'm wondering what the difference is between console.log() and console.debug(). Is there some way to use a bunch of console.debug() statements and then just flip a switch to easily shut off all debug statements from being sent to the console (like after launching a site)?

回答1:

For at least IE, Firefox and Chrome consoles, .debug() is just an alias for .log() added for improved compatibility

https://developer.mozilla.org/en-US/docs/Web/API/console

https://developers.google.com/chrome-developer-tools/docs/console-api#consoledebugobject_object

https://msdn.microsoft.com/en-us/library/ie/hh772183(v=vs.85).aspx

回答2:

Technically console.log console.debug and console.info are identical However the way they display the data is little different

console.log Black color text with no icon

console.info Blue color text with icon

console.debug Pure black color text

console.warn Yellow color text with icon

console.error Red Color text with icon

var playerOne = 120;
var playerTwo = 130;
var playerThree = 140;
var playerFour = 150;
var playerFive = 160;

console.log("Console.log" + " " +  playerOne);
console.debug("Console.debug" + " " +playerTwo);
console.warn("Console.warn" + " " + playerThree);
console.info("Console.info" + " " + playerFour);
console.error("Console.error" + " " + playerFive);

回答3:

they are identical except for 1 thing - debug messages are hidden by default in recent versions of Chrome (you have to set log level to Verbose on top of console to see debug messages; you see log messages by default).

回答4:

console.info ,console.debug methods are identical to console.log.

• console.log Printing statement
• console.info Black color text with "i" icon in blue color
• console.debug Blue Color text

Documentation:

• Chrome
• IE
• Edge
• FireFox
• Safari

回答5:

From Documentation of browsers,The log,debugand also info methods are identical in implementation wise but varies in color and icon

https://jsfiddle.net/yp4z76gg/1/

回答6:

If you want the ability to disable logging after a product is finished you could override the console.debug() function or make another custom one.

console.debug = function() {
    if(!console.debugging) return;
    console.log.apply(this, arguments);
};

console.debugging = true;
console.debug('Foo', {age:41, name:'Jhon Doe'});

Foo▸ {age: 41, name: "Jhon Doe"}

console.debugging = false;
console.debug('Foo', {age:26, name:'Jane Doe'});

No output

However I havent figured a way to color the outputs as well.