Lack of document on how to configure and use log4js

[jvchbabu]

In order to use log4js framework. I downloaded and followed the instructions mentioned at http://stritti.github.io/log4js/. But could n't able proceed further as logger initialization itself failed.
Error i got when tried to create a logger is below.
Uncaught TypeError: Log4js.Logger is not a function(…).
Please help us to use log4js

[DenEwout]

I came here with the exact same issue. The logger for internal use in Log4js can't be created.

[oussama-benmahmoud]

I have the same error here.

[oussama-benmahmoud]

Even after building the the log4js.js file I had this error Uncaught ReferenceError: log4jsLogger is not defined

[waynejuckts]

same here

[mrafaqi]

I get the same problem. Log4js is not populated with properties.

[venkatsep14]

Has anyone had a solution for this?

[tjwelde]

I got it working by building it with grunt.

1. cd into log4js subdirectory
2. npm install
3. grunt build
4. include the target/log4js.min.js file in your project

[keltik85]

same issue, here chrome log:

Uncaught TypeError: Log4js.Logger is not a functionLog4js.getLogger @ log4js.js:85(anonymous function) @ logger-test.html:7
logger-test.html:14 Uncaught TypeError: Cannot read property 'info' of undefined(anonymous function) @ logger-test.html:14

[nangsaigon]

Still got this issue.:(

[keltik85]

Why use a logger with Javascript anyways? Firebug and Chrome have the best debugging tools!

[nangsaigon]

With the client log, we may troubleshoot more quickly.
We have a project here requires to output client side log to file.

[jinahya]

I came here for the same issue. Is even this project(repository) alive?

[kimballjohnson]

I believe that Log4Js presumes some dependencies that are installed when the installation is in a node project. especially when installed by npm or bower. however, I'm using it in a basic web site, web application and it is hanging.
I'm going to try log4javascript.

[uthaman]

Modify Gruntfile.js to include log4js-all.js and build.
concat: { build: { src: ["src/main/js/log4js.js", "src/main/js/level.js", "src/main/js/logger.js", "src/main/js/custom-event.js", "src/main/js/logging-event.js", "src/main/js/appender.js", "src/main/js/appenders/*.js", "src/main/js/layout.js", "src/main/js/layouts/*.js", "src/main/js/date-formatter.js", "src/main/js/fifo-buffer.js", "src/main/js/log4js-all.js"], dest: "target/files/<%= pkg.name %>/js/<%= pkg.name %>.combined.js" } },

It should work now, took a while to figure this out.

[Sae1962]

For a newbie for log4js, the information here is clearly not working. It is written both in the documentation above & the only library file, log4js.js, that this file is the only file needed for logging. However, when I try the logger example on the page above, I get the following errors:

Uncaught TypeError: Log4js.Logger is not a constructor at new getLogger (log4js.js:85) at logger.html:7 getLogger @ log4js.js:85 (anonymous) @ logger.html:7 logger.html:15 Uncaught TypeError: Cannot read property 'info' of undefined at logger.html:15

Attached, you see the top directory of the test project.
Logging.zip