This is a quick reference list of JavaScript console methods with examples of how they are used.

• JavaScript – console.assert() Method
  The console.assert() method writes a message to the console if an expression evaluates to false.
• JavaScript – console.clear() Method
  The console.clear() method clears the console, and depending on the browser, may write “Console was cleared” in the console.
• JavaScript – console.count() Method
  The console.count() method counts the number of times console.count() is called and writes the number to the console.
• JavaScript – console.error() Method
  The console.error() method writes an error message to the console, which can be useful for testing purposes.
• JavaScript – console.group() Method
  The console.group() method starts a message group, and all new messages will be written inside this group.
• JavaScript – console.groupCollapsed() Method
  The console.groupCollapsed() method starts a collapsed message group (which can be expanded), and all new messages will be inside this group.
• JavaScript – console.groupEnd() Method
  The console.groupEnd() method ends a console message group created with the console.group() method.
• JavaScript – console.info() Method
  The console.info() method writes a message to the browser console.
• JavaScript – console.log() Method
  The console.log() method logs a message to the browser console, which is useful for testing purposes.
• JavaScript – console.table() Method
  The console.table() method writes a table to the console.
• JavaScript – console.trace() Method
  The console.trace() method displays a trace that shows how the code ended up at a certain point.
• JavaScript – console.time() Method
  The console.time() method starts a timer in the console to time code for testing purposes.
• JavaScript – console.warn() Method
  The console.warn() method writes a warning to the console.
• JavaScript – console.timeEnd() Method
  The console.timeEnd() method ends a timer in the console that was started with the console.time() method.