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interface Console

The Console interface provides methods for logging information to the console, as well as other utility methods for debugging and inspecting code. Methods include logging, debugging, and timing functionality.

Methods #

#assert(
condition?: boolean,
...data: any[],
): void

Tests that an expression is true. If not, logs an error message

#clear(): void

Clears the console if the environment allows it

#count(label?: string): void

Maintains an internal counter for a given label, incrementing it each time the method is called

#countReset(label?: string): void

Resets the counter for a given label

#debug(...data: any[]): void

Outputs a debugging message to the console

#dir(
item?: any,
options?: any,
): void

Displays a list of the properties of a specified object

#error(...data: any[]): void

Outputs an error message to the console. This method routes the output to stderr, unlike other console methods that route to stdout.

#group(...data: any[]): void

Creates a new inline group in the console, indenting subsequent console messages

#groupCollapsed(...data: any[]): void

Creates a new inline group in the console that is initially collapsed

#groupEnd(): void

Exits the current inline group in the console

#info(...data: any[]): void

Outputs an informational message to the console

#log(...data: any[]): void

Outputs a message to the console

#table(
tabularData?: any,
properties?: string[],
): void

Displays tabular data as a table

#time(label?: string): void

Starts a timer you can use to track how long an operation takes

#timeEnd(label?: string): void

Stops a timer that was previously started

#timeLog(
label?: string,
...data: any[],
): void

Logs the current value of a timer that was previously started

#trace(...data: any[]): void

Outputs a stack trace to the console

#warn(...data: any[]): void

Outputs a warning message to the console

#timeStamp(label?: string): void

Adds a marker to the DevTools Performance panel

#profile(label?: string): void

Starts recording a performance profile

#profileEnd(label?: string): void

Stops recording a performance profile

See #