Console.log and debug not printing, only return undefined. Why it can be? I've tried to re-install chrome, but it doesn't help.
Here is screenshot from chrome's main page, so functions are not redefined in some code
This question is related to
google-chrome
console
Click “Default levels” right next to filter and do make sure that "Info" is checked.
Please see screenshot:
This worked for me. In the console section, go to the settings on top right. There select preserve log and Log XMLHttpsRequests.
I'm working on a site where some JS (or other) code is preventing console.log
from working (console.log
is probably overwritten). You can test this by checking if console.log
works on a different page (like this one).
I don't have time to investigate further right now so used alert("something is: "+something)
to get the info I wanted from a snippet I needed to run.
In my case, i was not able to see logs because there is some text in Filter field, which caused results of console.log to disappear. Once we clear text in Filter field, it should show.
Make sure the filter box is empty
There could also be some filters applied to the console. Remove them.
I experienced the same problem. The solution for me was to disable Firebug because Firebug was intercepting the logs in the background resulting in no logs being shown in the Chrome console.
see if something show on the filter box in console ,it means something override your script clear the filter box and check again. i my case this is the issue.
For completeness: In the current version of chrome, the setting is no longer at the bottom but can be found when clicking the "Filter" icon at the top of the console tab (second icon from the left)
As of today, the UI of developer tools in Google chrome has changed where we select the log level of log statements being shown in the console. There is a logging level drop down beside "Filter" text box. Supported values are Verbose
, Info
, Warnings
and Errors
with Info
being the default selection.
Any log whose severity is equal or higher will get shown in the "Console" tab e.g. if selected log level is Info
then all the logs having level Info
, Warning
and Error
will get displayed in console.
When I changed it to Verbose
then my console.debug
and console.log
statements started showing up in the console. Till the time Info
level was selected they were not getting shown.
As of July 2020 the Chrome UI has changed once again and the logging level dropdown doesn't seem to do anything now.
Instead, there's a new pane to the left of the main console pane, which may have got unintentionally set to one of the restrictive logging levels:
Select the top category (messages) to reveal all the logging:
EDIT: EVEN THEN Chrome seems to add things to the Filter box, which again loses some logging, so you must CLEAR THE FILTER BOX TOO!
(Filter box is at the top of both my pics above, under "Network conditions"; you can see that it has some contents about "urlwebpack" which I didn't put there!)
Sometimes the simplest things trip us up...
Type console.log
in the console and check what function gets returned. If you see ƒ log() { [native code] }
then it's something else. If you see ƒ (){}
then somewhere down the line the native console.log function was changed.
Was working on a client's site today and that was the issue. If that's the case, you can either manually restore the console.log function or use console.dir() or console.warn() instead.
If you see ƒ (){}
then there is a possibility that sometime console stops working due to some functionality you have added in your javascript. so first close all tabs restart chrome and in a new tab just typ1 console.log('hi');
if it prints that then it confirms that the problem is there in your script code. if not then restore the cosole.log.
To restore the console in new tab go to console and type delete window.console
it will return true
after that restart the chrome and you are good to go.
In my case was webpack having the UglifyPlugin running with drop_console: true
set
If you are seeing(3 messages are hidden by filters. Show all messages.) then click on show all message link in Chrome dev tool console.
Because if this option enabled by mistake the console.log("")
message will show but this will in in hidden state.
In my case it was just an old cached Javascript file. After clearing the cache I saw my logs.
Source: Stackoverflow.com