This needs to be global to avoid TS2403 in case lib.dom.d.ts is present in the same build

Hierarchy

  • ChatLog

Constructors

Properties

_enableLog: boolean = true
_enableTimestamp: boolean = true
_h: undefined | PrintFunctionType
_tag: string = '[test]'

Accessors

Methods

  • Parameters

    • type: string
    • f: PrintFunctionType
    • Optional message: any
    • Rest ...optionalParams: any[]

    Returns void

  • console.assert() writes a message if value is falsy or omitted. It only writes a message and does not otherwise affect execution. The output always starts with "Assertion failed". If provided, message is formatted using util.format().

    If value is truthy, nothing happens.

    console.assert(true, 'does nothing');

    console.assert(false, 'Whoops %s work', 'didn\'t');
    // Assertion failed: Whoops didn't work

    console.assert();
    // Assertion failed

    Parameters

    • value: any

      The value tested for being truthy.

    • Optional message: string

      All arguments besides value are used as error message.

    • Rest ...optionalParams: any[]

    Returns void

    Since

    v0.1.101

  • When stdout is a TTY, calling console.clear() will attempt to clear the TTY. When stdout is not a TTY, this method does nothing.

    The specific operation of console.clear() can vary across operating systems and terminal types. For most Linux operating systems, console.clear()operates similarly to the clear shell command. On Windows, console.clear()will clear only the output in the current terminal viewport for the Node.js binary.

    Returns void

    Since

    v8.3.0

  • Maintains an internal counter specific to label and outputs to stdout the number of times console.count() has been called with the given label.

    > console.count()
    default: 1
    undefined
    > console.count('default')
    default: 2
    undefined
    > console.count('abc')
    abc: 1
    undefined
    > console.count('xyz')
    xyz: 1
    undefined
    > console.count('abc')
    abc: 2
    undefined
    > console.count()
    default: 3
    undefined
    >

    Parameters

    • Optional label: string

      The display label for the counter.

    Returns void

    Since

    v8.3.0

  • Resets the internal counter specific to label.

    > console.count('abc');
    abc: 1
    undefined
    > console.countReset('abc');
    undefined
    > console.count('abc');
    abc: 1
    undefined
    >

    Parameters

    • Optional label: string

      The display label for the counter.

    Returns void

    Since

    v8.3.0

  • The console.debug() function is an alias for log.

    Parameters

    • Optional message: any
    • Rest ...optionalParams: any[]

    Returns void

    Since

    v8.0.0

  • Uses util.inspect() on obj and prints the resulting string to stdout. This function bypasses any custom inspect() function defined on obj.

    Parameters

    • obj: any
    • Optional options: InspectOptions

    Returns void

    Since

    v0.1.101

  • This method calls console.log() passing it the arguments received. This method does not produce any XML formatting.

    Parameters

    • Rest ...data: any[]

    Returns void

    Since

    v8.0.0

  • Prints to stderr with newline. Multiple arguments can be passed, with the first used as the primary message and all additional used as substitution values similar to printf(3) (the arguments are all passed to util.format()).

    const code = 5;
    console.error('error #%d', code);
    // Prints: error #5, to stderr
    console.error('error', code);
    // Prints: error 5, to stderr

    If formatting elements (e.g. %d) are not found in the first string then util.inspect() is called on each argument and the resulting string values are concatenated. See util.format() for more information.

    Parameters

    • Optional message: any
    • Rest ...optionalParams: any[]

    Returns void

    Since

    v0.1.100

  • Increases indentation of subsequent lines by spaces for groupIndentationlength.

    If one or more labels are provided, those are printed first without the additional indentation.

    Parameters

    • Rest ...label: any[]

    Returns void

    Since

    v8.5.0

  • An alias for group.

    Parameters

    • Rest ...label: any[]

    Returns void

    Since

    v8.5.0

  • Decreases indentation of subsequent lines by spaces for groupIndentationlength.

    Returns void

    Since

    v8.5.0

  • The console.info() function is an alias for log.

    Parameters

    • Optional message: any
    • Rest ...optionalParams: any[]

    Returns void

    Since

    v0.1.100

  • Prints to stdout with newline. Multiple arguments can be passed, with the first used as the primary message and all additional used as substitution values similar to printf(3) (the arguments are all passed to util.format()).

    const count = 5;
    console.log('count: %d', count);
    // Prints: count: 5, to stdout
    console.log('count:', count);
    // Prints: count: 5, to stdout

    See util.format() for more information.

    Parameters

    • Optional message: any
    • Rest ...optionalParams: any[]

    Returns void

    Since

    v0.1.100

  • This method does not display anything unless used in the inspector. Starts a JavaScript CPU profile with an optional label.

    Parameters

    • Optional label: string

    Returns void

  • This method does not display anything unless used in the inspector. Stops the current JavaScript CPU profiling session if one has been started and prints the report to the Profiles panel of the inspector.

    Parameters

    • Optional label: string

    Returns void

  • Try to construct a table with the columns of the properties of tabularData(or use properties) and rows of tabularData and log it. Falls back to just logging the argument if it can’t be parsed as tabular.

    // These can't be parsed as tabular data
    console.table(Symbol());
    // Symbol()

    console.table(undefined);
    // undefined

    console.table([{ a: 1, b: 'Y' }, { a: 'Z', b: 2 }]);
    // ┌─────────┬─────┬─────┐
    // │ (index) │ a │ b │
    // ├─────────┼─────┼─────┤
    // │ 0 │ 1 │ 'Y' │
    // │ 1 │ 'Z' │ 2 │
    // └─────────┴─────┴─────┘

    console.table([{ a: 1, b: 'Y' }, { a: 'Z', b: 2 }], ['a']);
    // ┌─────────┬─────┐
    // │ (index) │ a │
    // ├─────────┼─────┤
    // │ 0 │ 1 │
    // │ 1 │ 'Z' │
    // └─────────┴─────┘

    Parameters

    • tabularData: any
    • Optional properties: readonly string[]

      Alternate properties for constructing the table.

    Returns void

    Since

    v10.0.0

  • Starts a timer that can be used to compute the duration of an operation. Timers are identified by a unique label. Use the same label when calling timeEnd to stop the timer and output the elapsed time in suitable time units to stdout. For example, if the elapsed time is 3869ms, console.timeEnd() displays "3.869s".

    Parameters

    • Optional label: string

    Returns void

    Since

    v0.1.104

  • Stops a timer that was previously started by calling time and prints the result to stdout:

    console.time('100-elements');
    for (let i = 0; i < 100; i++) {}
    console.timeEnd('100-elements');
    // prints 100-elements: 225.438ms

    Parameters

    • Optional label: string

    Returns void

    Since

    v0.1.104

  • For a timer that was previously started by calling time, prints the elapsed time and other data arguments to stdout:

    console.time('process');
    const value = expensiveProcess1(); // Returns 42
    console.timeLog('process', value);
    // Prints "process: 365.227ms 42".
    doExpensiveProcess2(value);
    console.timeEnd('process');

    Parameters

    • Optional label: string
    • Rest ...data: any[]

    Returns void

    Since

    v10.7.0

  • This method does not display anything unless used in the inspector. Adds an event with the label label to the Timeline panel of the inspector.

    Parameters

    • Optional label: string

    Returns void

  • Prints to stderr the string 'Trace: ', followed by the util.format() formatted message and stack trace to the current position in the code.

    console.trace('Show me');
    // Prints: (stack trace will vary based on where trace is called)
    // Trace: Show me
    // at repl:2:9
    // at REPLServer.defaultEval (repl.js:248:27)
    // at bound (domain.js:287:14)
    // at REPLServer.runBound [as eval] (domain.js:300:12)
    // at REPLServer.<anonymous> (repl.js:412:12)
    // at emitOne (events.js:82:20)
    // at REPLServer.emit (events.js:169:7)
    // at REPLServer.Interface._onLine (readline.js:210:10)
    // at REPLServer.Interface._line (readline.js:549:8)
    // at REPLServer.Interface._ttyWrite (readline.js:826:14)

    Parameters

    • Optional message: any
    • Rest ...optionalParams: any[]

    Returns void

    Since

    v0.1.104

  • The console.warn() function is an alias for error.

    Parameters

    • Optional message: any
    • Rest ...optionalParams: any[]

    Returns void

    Since

    v0.1.100

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