Class console  |  Apps Script  |  Google for Developers (original) (raw)

Class console

console

This class allows the developer to write to the Execution log and to Google Cloud Logging if the script is associated with a standard Cloud Project.

For full support of Cloud Logging and structured logging, use [Logger](/apps-script/reference/base/logger). The console methods serialize the objects to strings and do not support jsonPayload as part of the structured logging LogEntry.

function measuringExecutionTime() { const label = "myFunction() time"; // Labels the timing log entry. console.time(label); // Starts the timer. try { myFunction(); // Function to time. } catch (e) { // Logs an ERROR message. console.error("myFunction() yielded an error: " + e); } console.timeEnd(label); // Stops the timer, logs execution duration. }

function myFunction() { // ... }

Methods

Method Return type Brief description
error() void Outputs a blank ERROR level message to Stackdriver Logging.
error(formatOrObject, values) void Outputs an ERROR level message to Stackdriver Logging.
info() void Outputs blank INFO level message to Stackdriver Logging.
info(formatOrObject, values) void Outputs an INFO level message to Stackdriver Logging.
log() void Outputs a blank DEBUG level message to Stackdriver Logging.
log(formatOrObject, values) void Outputs a DEBUG level message to Stackdriver Logging.
time(label) void Starts a timer you can use to track how long an operation takes.
timeEnd(label) void Stops a timer that was previously started by calling console.time().
warn() void Outputs a blank WARNING level message to Stackdriver Logging.
warn(formatOrObject, values) void Outputs a WARNING level message to Stackdriver Logging.

Detailed documentation

error()

Outputs a blank ERROR level message to Stackdriver Logging.

error(formatOrObject, values)

Outputs an ERROR level message to Stackdriver Logging.

Parameters

Name Type Description
formatOrObject Object a string containing zero or more substitution strings, or a JavaScript object to be logged as a JavaScript object if no other parameters.
values Object... objects with which to replace substitution strings within the message. This gives you additional control over the format of the output.

info()

Outputs blank INFO level message to Stackdriver Logging.

info(formatOrObject, values)

Outputs an INFO level message to Stackdriver Logging.

Parameters

Name Type Description
formatOrObject Object a string containing zero or more substitution strings, or a JavaScript object to be logged as a JavaScript object if no other parameters.
values Object... objects with which to replace substitution strings within the message. This gives you additional control over the format of the output.

log()

Outputs a blank DEBUG level message to Stackdriver Logging.

log(formatOrObject, values)

Outputs a DEBUG level message to Stackdriver Logging.

Parameters

Name Type Description
formatOrObject Object a string containing zero or more substitution strings, or a JavaScript object to be logged as a JavaScript object if no other parameters.
values Object... objects with which to replace substitution strings within the message. This gives you additional control over the format of the output.

time(label)

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

Parameters

Name Type Description
label String The name to give the new timer.

timeEnd(label)

Stops a timer that was previously started by calling console.time(). The time duration is logged in Stackdriver.

Parameters

Name Type Description
label String the name of the timer to stop.

warn()

Outputs a blank WARNING level message to Stackdriver Logging.

warn(formatOrObject, values)

Outputs a WARNING level message to Stackdriver Logging.

Parameters

Name Type Description
formatOrObject Object a string containing zero or more substitution strings, or a JavaScript object to be logged as a JavaScript object if no other parameters.
values Object... objects with which to replace substitution strings within the message. This gives you additional control over the format of the output.

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Last updated 2025-12-11 UTC.