Elep

{
 "type": "module",
 "source": "doc/api/console.md",
 "modules": [
 {
 "textRaw": "Console",
 "name": "console",
 "introduced_in": "v0.10.13",
 "stability": 2,
 "stabilityText": "Stable",
 "desc": "The <code>console</code> module provides a simple debugging console that is similar to the\nJavaScript console mechanism provided by web browsers.\nThe module exports two specific components:\n<ul>\n<li>A <code>Console</code> class with methods such as <code>console.log()</code>, <code>console.error()</code> and\n<code>console.warn()</code> that can be used to write to any Node.js stream.</li>\n<li>A global <code>console</code> instance configured to write to <a href=\"process.html#process_process_stdout\"><code>process.stdout</code></a> and\n<a href=\"process.html#process_process_stderr\"><code>process.stderr</code></a>. The global <code>console</code> can be used without calling\n<code>require('console')</code>.</li>\n</ul>\nWarning: The global console object's methods are neither consistently\nsynchronous like the browser APIs they resemble, nor are they consistently\nasynchronous like all other Node.js streams. See the <a href=\"process.html#process_a_note_on_process_i_o\">note on process I/O</a> for\nmore information.\nExample using the global <code>console</code>:\n<pre><code class=\"language-js\">console.log('hello world');\n// Prints: hello world, to stdout\nconsole.log('hello %s', 'world');\n// Prints: hello world, to stdout\nconsole.error(new Error('Whoops, something bad happened'));\n// Prints: [Error: Whoops, something bad happened], to stderr\n\nconst name = 'Will Robinson';\nconsole.warn(`Danger ${name}! Danger!`);\n// Prints: Danger Will Robinson! Danger!, to stderr\n</code></pre>\nExample using the <code>Console</code> class:\n<pre><code class=\"language-js\">const out = getStreamSomehow();\nconst err = getStreamSomehow();\nconst myConsole = new console.Console(out, err);\n\nmyConsole.log('hello world');\n// Prints: hello world, to out\nmyConsole.log('hello %s', 'world');\n// Prints: hello world, to out\nmyConsole.error(new Error('Whoops, something bad happened'));\n// Prints: [Error: Whoops, something bad happened], to err\n\nconst name = 'Will Robinson';\nmyConsole.warn(`Danger ${name}! Danger!`);\n// Prints: Danger Will Robinson! Danger!, to err\n</code></pre>",
 "classes": [
 {
 "textRaw": "Class: Console",
 "type": "class",
 "name": "Console",
 "meta": {
 "changes": [
 {
 "version": "v8.0.0",
 "pr-url": "https://github.com/nodejs/node/pull/9744",
 "description": "Errors that occur while writing to the underlying streams will now be ignored by default."
 }
 ]
 },
 "desc": "The <code>Console</code> class can be used to create a simple logger with configurable\noutput streams and can be accessed using either <code>require('console').Console</code>\nor <code>console.Console</code> (or their destructured counterparts):\n<pre><code class=\"language-js\">const { Console } = require('console');\n</code></pre>\n<pre><code class=\"language-js\">const { Console } = console;\n</code></pre>",
 "methods": [
 {
 "textRaw": "console.assert(value[, ...message])",
 "type": "method",
 "name": "assert",
 "meta": {
 "added": [
 "v0.1.101"
 ],
 "changes": [
 {
 "version": "v10.0.0",
 "pr-url": "https://github.com/nodejs/node/pull/17706",
 "description": "The implementation is now spec compliant and does not throw anymore."
 }
 ]
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`value` {any} The value tested for being truthy.",
 "name": "value",
 "type": "any",
 "desc": "The value tested for being truthy."
 },
 {
 "textRaw": "`...message` {any} All arguments besides `value` are used as error message.",
 "name": "...message",
 "type": "any",
 "desc": "All arguments besides `value` are used as error message.",
 "optional": true
 }
 ]
 }
 ],
 "desc": "A simple assertion test that verifies whether <code>value</code> is truthy. If it is not,\n<code>Assertion failed</code> is logged. If provided, the error <code>message</code> is formatted\nusing <a href=\"util.html#util_util_format_format_args\"><code>util.format()</code></a> by passing along all message arguments. The output is\nused as the error message.\n<pre><code class=\"language-js\">console.assert(true, 'does nothing');\n// OK\nconsole.assert(false, 'Whoops %s work', 'didn\\'t');\n// Assertion failed: Whoops didn't work\n</code></pre>\nCalling <code>console.assert()</code> with a falsy assertion will only cause the <code>message</code>\nto be printed to the console without interrupting execution of subsequent code."
 },
 {
 "textRaw": "console.clear()",
 "type": "method",
 "name": "clear",
 "meta": {
 "added": [
 "v8.3.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": []
 }
 ],
 "desc": "When <code>stdout</code> is a TTY, calling <code>console.clear()</code> will attempt to clear the\nTTY. When <code>stdout</code> is not a TTY, this method does nothing.\nThe specific operation of <code>console.clear()</code> can vary across operating systems\nand terminal types. For most Linux operating systems, <code>console.clear()</code>\noperates similarly to the <code>clear</code> shell command. On Windows, <code>console.clear()</code>\nwill clear only the output in the current terminal viewport for the Node.js\nbinary."
 },
 {
 "textRaw": "console.count([label])",
 "type": "method",
 "name": "count",
 "meta": {
 "added": [
 "v8.3.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`label` {string} The display label for the counter. **Default:** `'default'`.",
 "name": "label",
 "type": "string",
 "default": "`'default'`",
 "desc": "The display label for the counter.",
 "optional": true
 }
 ]
 }
 ],
 "desc": "Maintains an internal counter specific to <code>label</code> and outputs to <code>stdout</code> the\nnumber of times <code>console.count()</code> has been called with the given <code>label</code>.\n\n<pre><code class=\"language-js\">> console.count()\ndefault: 1\nundefined\n> console.count('default')\ndefault: 2\nundefined\n> console.count('abc')\nabc: 1\nundefined\n> console.count('xyz')\nxyz: 1\nundefined\n> console.count('abc')\nabc: 2\nundefined\n> console.count()\ndefault: 3\nundefined\n>\n</code></pre>"
 },
 {
 "textRaw": "console.countReset([label])",
 "type": "method",
 "name": "countReset",
 "meta": {
 "added": [
 "v8.3.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`label` {string} The display label for the counter. **Default:** `'default'`.",
 "name": "label",
 "type": "string",
 "default": "`'default'`",
 "desc": "The display label for the counter.",
 "optional": true
 }
 ]
 }
 ],
 "desc": "Resets the internal counter specific to <code>label</code>.\n\n<pre><code class=\"language-js\">> console.count('abc');\nabc: 1\nundefined\n> console.countReset('abc');\nundefined\n> console.count('abc');\nabc: 1\nundefined\n>\n</code></pre>"
 },
 {
 "textRaw": "console.debug(data[, ...args])",
 "type": "method",
 "name": "debug",
 "meta": {
 "added": [
 "v8.0.0"
 ],
 "changes": [
 {
 "version": "v9.3.0",
 "pr-url": "https://github.com/nodejs/node/pull/17033",
 "description": "`console.debug` is now an alias for `console.log`."
 }
 ]
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`data` {any}",
 "name": "data",
 "type": "any"
 },
 {
 "textRaw": "`...args` {any}",
 "name": "...args",
 "type": "any",
 "optional": true
 }
 ]
 }
 ],
 "desc": "The <code>console.debug()</code> function is an alias for <a href=\"#console_console_log_data_args\"><code>console.log()</code></a>."
 },
 {
 "textRaw": "console.dir(obj[, options])",
 "type": "method",
 "name": "dir",
 "meta": {
 "added": [
 "v0.1.101"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`obj` {any}",
 "name": "obj",
 "type": "any"
 },
 {
 "textRaw": "`options` {Object}",
 "name": "options",
 "type": "Object",
 "options": [
 {
 "textRaw": "`showHidden` {boolean} If `true` then the object's non-enumerable and symbol properties will be shown too. **Default:** `false`.",
 "name": "showHidden",
 "type": "boolean",
 "default": "`false`",
 "desc": "If `true` then the object's non-enumerable and symbol properties will be shown too."
 },
 {
 "textRaw": "`depth` {number} Tells [`util.inspect()`][] how many times to recurse while formatting the object. This is useful for inspecting large complicated objects. To make it recurse indefinitely, pass `null`. **Default:** `2`.",
 "name": "depth",
 "type": "number",
 "default": "`2`",
 "desc": "Tells [`util.inspect()`][] how many times to recurse while formatting the object. This is useful for inspecting large complicated objects. To make it recurse indefinitely, pass `null`."
 },
 {
 "textRaw": "`colors` {boolean} If `true`, then the output will be styled with ANSI color codes. Colors are customizable; see [customizing `util.inspect()` colors][]. **Default:** `false`.",
 "name": "colors",
 "type": "boolean",
 "default": "`false`",
 "desc": "If `true`, then the output will be styled with ANSI color codes. Colors are customizable; see [customizing `util.inspect()` colors][]."
 }
 ],
 "optional": true
 }
 ]
 }
 ],
 "desc": "Uses <a href=\"util.html#util_util_inspect_object_options\"><code>util.inspect()</code></a> on <code>obj</code> and prints the resulting string to <code>stdout</code>.\nThis function bypasses any custom <code>inspect()</code> function defined on <code>obj</code>."
 },
 {
 "textRaw": "console.dirxml(...data)",
 "type": "method",
 "name": "dirxml",
 "meta": {
 "added": [
 "v8.0.0"
 ],
 "changes": [
 {
 "version": "v9.3.0",
 "pr-url": "https://github.com/nodejs/node/pull/17152",
 "description": "`console.dirxml` now calls `console.log` for its arguments."
 }
 ]
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`...data` {any}",
 "name": "...data",
 "type": "any"
 }
 ]
 }
 ],
 "desc": "This method calls <code>console.log()</code> passing it the arguments received.\nPlease note that this method does not produce any XML formatting."
 },
 {
 "textRaw": "console.error([data][, ...args])",
 "type": "method",
 "name": "error",
 "meta": {
 "added": [
 "v0.1.100"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`data` {any}",
 "name": "data",
 "type": "any",
 "optional": true
 },
 {
 "textRaw": "`...args` {any}",
 "name": "...args",
 "type": "any",
 "optional": true
 }
 ]
 }
 ],
 "desc": "Prints to <code>stderr</code> with newline. Multiple arguments can be passed, with the\nfirst used as the primary message and all additional used as substitution\nvalues similar to <a href=\"http://man7.org/linux/man-pages/man3/printf.3.html\"><code>printf(3)</code></a> (the arguments are all passed to\n<a href=\"util.html#util_util_format_format_args\"><code>util.format()</code></a>).\n<pre><code class=\"language-js\">const code = 5;\nconsole.error('error #%d', code);\n// Prints: error #5, to stderr\nconsole.error('error', code);\n// Prints: error 5, to stderr\n</code></pre>\nIf formatting elements (e.g. <code>%d</code>) are not found in the first string then\n<a href=\"util.html#util_util_inspect_object_options\"><code>util.inspect()</code></a> is called on each argument and the resulting string\nvalues are concatenated. See <a href=\"util.html#util_util_format_format_args\"><code>util.format()</code></a> for more information."
 },
 {
 "textRaw": "console.group([...label])",
 "type": "method",
 "name": "group",
 "meta": {
 "added": [
 "v8.5.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`...label` {any}",
 "name": "...label",
 "type": "any",
 "optional": true
 }
 ]
 }
 ],
 "desc": "Increases indentation of subsequent lines by two spaces.\nIf one or more <code>label</code>s are provided, those are printed first without the\nadditional indentation."
 },
 {
 "textRaw": "console.groupCollapsed()",
 "type": "method",
 "name": "groupCollapsed",
 "meta": {
 "added": [
 "v8.5.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": []
 }
 ],
 "desc": "An alias for <a href=\"#console_console_group_label\"><code>console.group()</code></a>."
 },
 {
 "textRaw": "console.groupEnd()",
 "type": "method",
 "name": "groupEnd",
 "meta": {
 "added": [
 "v8.5.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": []
 }
 ],
 "desc": "Decreases indentation of subsequent lines by two spaces."
 },
 {
 "textRaw": "console.info([data][, ...args])",
 "type": "method",
 "name": "info",
 "meta": {
 "added": [
 "v0.1.100"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`data` {any}",
 "name": "data",
 "type": "any",
 "optional": true
 },
 {
 "textRaw": "`...args` {any}",
 "name": "...args",
 "type": "any",
 "optional": true
 }
 ]
 }
 ],
 "desc": "The <code>console.info()</code> function is an alias for <a href=\"#console_console_log_data_args\"><code>console.log()</code></a>."
 },
 {
 "textRaw": "console.log([data][, ...args])",
 "type": "method",
 "name": "log",
 "meta": {
 "added": [
 "v0.1.100"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`data` {any}",
 "name": "data",
 "type": "any",
 "optional": true
 },
 {
 "textRaw": "`...args` {any}",
 "name": "...args",
 "type": "any",
 "optional": true
 }
 ]
 }
 ],
 "desc": "Prints to <code>stdout</code> with newline. Multiple arguments can be passed, with the\nfirst used as the primary message and all additional used as substitution\nvalues similar to <a href=\"http://man7.org/linux/man-pages/man3/printf.3.html\"><code>printf(3)</code></a> (the arguments are all passed to\n<a href=\"util.html#util_util_format_format_args\"><code>util.format()</code></a>).\n<pre><code class=\"language-js\">const count = 5;\nconsole.log('count: %d', count);\n// Prints: count: 5, to stdout\nconsole.log('count:', count);\n// Prints: count: 5, to stdout\n</code></pre>\nSee <a href=\"util.html#util_util_format_format_args\"><code>util.format()</code></a> for more information."
 },
 {
 "textRaw": "console.table(tabularData[, properties])",
 "type": "method",
 "name": "table",
 "meta": {
 "added": [
 "v10.0.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`tabularData` {any}",
 "name": "tabularData",
 "type": "any"
 },
 {
 "textRaw": "`properties` {string[]} Alternate properties for constructing the table.",
 "name": "properties",
 "type": "string[]",
 "desc": "Alternate properties for constructing the table.",
 "optional": true
 }
 ]
 }
 ],
 "desc": "Try to construct a table with the columns of the properties of <code>tabularData</code>\n(or use <code>properties</code>) and rows of <code>tabularData</code> and log it. Falls back to just\nlogging the argument if it can’t be parsed as tabular.\n<pre><code class=\"language-js\">// These can't be parsed as tabular data\nconsole.table(Symbol());\n// Symbol()\n\nconsole.table(undefined);\n// undefined\n\nconsole.table([{ a: 1, b: 'Y' }, { a: 'Z', b: 2 }]);\n// ┌─────────┬─────┬─────┐\n// │ (index) │ a │ b │\n// ├─────────┼─────┼─────┤\n// │ 0 │ 1 │ 'Y' │\n// │ 1 │ 'Z' │ 2 │\n// └─────────┴─────┴─────┘\n\nconsole.table([{ a: 1, b: 'Y' }, { a: 'Z', b: 2 }], ['a']);\n// ┌─────────┬─────┐\n// │ (index) │ a │\n// ├─────────┼─────┤\n// │ 0 │ 1 │\n// │ 1 │ 'Z' │\n// └─────────┴─────┘\n</code></pre>"
 },
 {
 "textRaw": "console.time([label])",
 "type": "method",
 "name": "time",
 "meta": {
 "added": [
 "v0.1.104"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`label` {string} **Default:** `'default'`",
 "name": "label",
 "type": "string",
 "default": "`'default'`",
 "optional": true
 }
 ]
 }
 ],
 "desc": "Starts a timer that can be used to compute the duration of an operation. Timers\nare identified by a unique <code>label</code>. Use the same <code>label</code> when calling\n<a href=\"#console_console_timeend_label\"><code>console.timeEnd()</code></a> to stop the timer and output the elapsed time in\nmilliseconds to <code>stdout</code>. Timer durations are accurate to the sub-millisecond."
 },
 {
 "textRaw": "console.timeEnd([label])",
 "type": "method",
 "name": "timeEnd",
 "meta": {
 "added": [
 "v0.1.104"
 ],
 "changes": [
 {
 "version": "v6.0.0",
 "pr-url": "https://github.com/nodejs/node/pull/5901",
 "description": "This method no longer supports multiple calls that don’t map to individual `console.time()` calls; see below for details."
 }
 ]
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`label` {string} **Default:** `'default'`",
 "name": "label",
 "type": "string",
 "default": "`'default'`",
 "optional": true
 }
 ]
 }
 ],
 "desc": "Stops a timer that was previously started by calling <a href=\"#console_console_time_label\"><code>console.time()</code></a> and\nprints the result to <code>stdout</code>:\n<pre><code class=\"language-js\">console.time('100-elements');\nfor (let i = 0; i &#x3C; 100; i++) {}\nconsole.timeEnd('100-elements');\n// prints 100-elements: 225.438ms\n</code></pre>"
 },
 {
 "textRaw": "console.timeLog([label][, ...data])",
 "type": "method",
 "name": "timeLog",
 "meta": {
 "added": [
 "v10.7.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`label` {string} **Default:** `'default'`",
 "name": "label",
 "type": "string",
 "default": "`'default'`",
 "optional": true
 },
 {
 "textRaw": "`...data` {any}",
 "name": "...data",
 "type": "any",
 "optional": true
 }
 ]
 }
 ],
 "desc": "For a timer that was previously started by calling <a href=\"#console_console_time_label\"><code>console.time()</code></a>, prints\nthe elapsed time and other <code>data</code> arguments to <code>stdout</code>:\n<pre><code class=\"language-js\">console.time('process');\nconst value = expensiveProcess1(); // Returns 42\nconsole.timeLog('process', value);\n// Prints \"process: 365.227ms 42\".\ndoExpensiveProcess2(value);\nconsole.timeEnd('process');\n</code></pre>"
 },
 {
 "textRaw": "console.trace([message][, ...args])",
 "type": "method",
 "name": "trace",
 "meta": {
 "added": [
 "v0.1.104"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`message` {any}",
 "name": "message",
 "type": "any",
 "optional": true
 },
 {
 "textRaw": "`...args` {any}",
 "name": "...args",
 "type": "any",
 "optional": true
 }
 ]
 }
 ],
 "desc": "Prints to <code>stderr</code> the string <code>'Trace: '</code>, followed by the <a href=\"util.html#util_util_format_format_args\"><code>util.format()</code></a>\nformatted message and stack trace to the current position in the code.\n<pre><code class=\"language-js\">console.trace('Show me');\n// Prints: (stack trace will vary based on where trace is called)\n// Trace: Show me\n// at repl:2:9\n// at REPLServer.defaultEval (repl.js:248:27)\n// at bound (domain.js:287:14)\n// at REPLServer.runBound [as eval] (domain.js:300:12)\n// at REPLServer.&#x3C;anonymous> (repl.js:412:12)\n// at emitOne (events.js:82:20)\n// at REPLServer.emit (events.js:169:7)\n// at REPLServer.Interface._onLine (readline.js:210:10)\n// at REPLServer.Interface._line (readline.js:549:8)\n// at REPLServer.Interface._ttyWrite (readline.js:826:14)\n</code></pre>"
 },
 {
 "textRaw": "console.warn([data][, ...args])",
 "type": "method",
 "name": "warn",
 "meta": {
 "added": [
 "v0.1.100"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`data` {any}",
 "name": "data",
 "type": "any",
 "optional": true
 },
 {
 "textRaw": "`...args` {any}",
 "name": "...args",
 "type": "any",
 "optional": true
 }
 ]
 }
 ],
 "desc": "The <code>console.warn()</code> function is an alias for <a href=\"#console_console_error_data_args\"><code>console.error()</code></a>."
 }
 ],
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`stdout` {stream.Writable}",
 "name": "stdout",
 "type": "stream.Writable"
 },
 {
 "textRaw": "`stderr` {stream.Writable}",
 "name": "stderr",
 "type": "stream.Writable",
 "optional": true
 },
 {
 "textRaw": "`ignoreErrors` {boolean} Ignore errors when writing to the underlying streams. **Default:** `true`.",
 "name": "ignoreErrors",
 "type": "boolean",
 "default": "`true`",
 "desc": "Ignore errors when writing to the underlying streams.",
 "optional": true
 }
 ],
 "desc": "Creates a new <code>Console</code> with one or two writable stream instances. <code>stdout</code> is a\nwritable stream to print log or info output. <code>stderr</code> is used for warning or\nerror output. If <code>stderr</code> is not provided, <code>stdout</code> is used for <code>stderr</code>.\n<pre><code class=\"language-js\">const output = fs.createWriteStream('./stdout.log');\nconst errorOutput = fs.createWriteStream('./stderr.log');\n// custom simple logger\nconst logger = new Console({ stdout: output, stderr: errorOutput });\n// use it like console\nconst count = 5;\nlogger.log('count: %d', count);\n// in stdout.log: count 5\n</code></pre>\nThe global <code>console</code> is a special <code>Console</code> whose output is sent to\n<a href=\"process.html#process_process_stdout\"><code>process.stdout</code></a> and <a href=\"process.html#process_process_stderr\"><code>process.stderr</code></a>. It is equivalent to calling:\n<pre><code class=\"language-js\">new Console({ stdout: process.stdout, stderr: process.stderr });\n</code></pre>"
 },
 {
 "params": [
 {
 "textRaw": "`options` {Object}",
 "name": "options",
 "type": "Object",
 "options": [
 {
 "textRaw": "`stdout` {stream.Writable}",
 "name": "stdout",
 "type": "stream.Writable"
 },
 {
 "textRaw": "`stderr` {stream.Writable}",
 "name": "stderr",
 "type": "stream.Writable"
 },
 {
 "textRaw": "`ignoreErrors` {boolean} Ignore errors when writing to the underlying streams. **Default:** `true`.",
 "name": "ignoreErrors",
 "type": "boolean",
 "default": "`true`",
 "desc": "Ignore errors when writing to the underlying streams."
 },
 {
 "textRaw": "`colorMode` {boolean|string} Set color support for this `Console` instance. Setting to `true` enables coloring while inspecting values, setting to `'auto'` will make color support depend on the value of the `isTTY` property and the value returned by `getColorDepth()` on the respective stream. **Default:** `'auto'`.",
 "name": "colorMode",
 "type": "boolean|string",
 "default": "`'auto'`",
 "desc": "Set color support for this `Console` instance. Setting to `true` enables coloring while inspecting values, setting to `'auto'` will make color support depend on the value of the `isTTY` property and the value returned by `getColorDepth()` on the respective stream."
 }
 ]
 }
 ],
 "desc": "Creates a new <code>Console</code> with one or two writable stream instances. <code>stdout</code> is a\nwritable stream to print log or info output. <code>stderr</code> is used for warning or\nerror output. If <code>stderr</code> is not provided, <code>stdout</code> is used for <code>stderr</code>.\n<pre><code class=\"language-js\">const output = fs.createWriteStream('./stdout.log');\nconst errorOutput = fs.createWriteStream('./stderr.log');\n// custom simple logger\nconst logger = new Console({ stdout: output, stderr: errorOutput });\n// use it like console\nconst count = 5;\nlogger.log('count: %d', count);\n// in stdout.log: count 5\n</code></pre>\nThe global <code>console</code> is a special <code>Console</code> whose output is sent to\n<a href=\"process.html#process_process_stdout\"><code>process.stdout</code></a> and <a href=\"process.html#process_process_stderr\"><code>process.stderr</code></a>. It is equivalent to calling:\n<pre><code class=\"language-js\">new Console({ stdout: process.stdout, stderr: process.stderr });\n</code></pre>"
 }
 ]
 }
 ],
 "modules": [
 {
 "textRaw": "Inspector only methods",
 "name": "inspector_only_methods",
 "desc": "The following methods are exposed by the V8 engine in the general API but do\nnot display anything unless used in conjunction with the <a href=\"debugger.html\">inspector</a>\n(<code>--inspect</code> flag).",
 "methods": [
 {
 "textRaw": "console.markTimeline([label])",
 "type": "method",
 "name": "markTimeline",
 "meta": {
 "added": [
 "v8.0.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`label` {string} **Default:** `'default'`",
 "name": "label",
 "type": "string",
 "default": "`'default'`",
 "optional": true
 }
 ]
 }
 ],
 "desc": "This method does not display anything unless used in the inspector. The\n<code>console.markTimeline()</code> method is the deprecated form of\n<a href=\"#console_console_timestamp_label\"><code>console.timeStamp()</code></a>."
 },
 {
 "textRaw": "console.profile([label])",
 "type": "method",
 "name": "profile",
 "meta": {
 "added": [
 "v8.0.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`label` {string}",
 "name": "label",
 "type": "string",
 "optional": true
 }
 ]
 }
 ],
 "desc": "This method does not display anything unless used in the inspector. The\n<code>console.profile()</code> method starts a JavaScript CPU profile with an optional\nlabel until <a href=\"#console_console_profileend_label\"><code>console.profileEnd()</code></a> is called. The profile is then added to\nthe Profile panel of the inspector.\n<pre><code class=\"language-js\">console.profile('MyLabel');\n// Some code\nconsole.profileEnd('MyLabel');\n// Adds the profile 'MyLabel' to the Profiles panel of the inspector.\n</code></pre>"
 },
 {
 "textRaw": "console.profileEnd([label])",
 "type": "method",
 "name": "profileEnd",
 "meta": {
 "added": [
 "v8.0.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`label` {string}",
 "name": "label",
 "type": "string",
 "optional": true
 }
 ]
 }
 ],
 "desc": "This method does not display anything unless used in the inspector. Stops the\ncurrent JavaScript CPU profiling session if one has been started and prints\nthe report to the Profiles panel of the inspector. See\n<a href=\"#console_console_profile_label\"><code>console.profile()</code></a> for an example.\nIf this method is called without a label, the most recently started profile is\nstopped."
 },
 {
 "textRaw": "console.timeStamp([label])",
 "type": "method",
 "name": "timeStamp",
 "meta": {
 "added": [
 "v8.0.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`label` {string}",
 "name": "label",
 "type": "string",
 "optional": true
 }
 ]
 }
 ],
 "desc": "This method does not display anything unless used in the inspector. The\n<code>console.timeStamp()</code> method adds an event with the label <code>'label'</code> to the\nTimeline panel of the inspector."
 },
 {
 "textRaw": "console.timeline([label])",
 "type": "method",
 "name": "timeline",
 "meta": {
 "added": [
 "v8.0.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`label` {string} **Default:** `'default'`",
 "name": "label",
 "type": "string",
 "default": "`'default'`",
 "optional": true
 }
 ]
 }
 ],
 "desc": "This method does not display anything unless used in the inspector. The\n<code>console.timeline()</code> method is the deprecated form of <a href=\"#console_console_time_label\"><code>console.time()</code></a>."
 },
 {
 "textRaw": "console.timelineEnd([label])",
 "type": "method",
 "name": "timelineEnd",
 "meta": {
 "added": [
 "v8.0.0"
 ],
 "changes": []
 },
 "signatures": [
 {
 "params": [
 {
 "textRaw": "`label` {string} **Default:** `'default'`",
 "name": "label",
 "type": "string",
 "default": "`'default'`",
 "optional": true
 }
 ]
 }
 ],
 "desc": "This method does not display anything unless used in the inspector. The\n<code>console.timelineEnd()</code> method is the deprecated form of\n<a href=\"#console_console_timeend_label\"><code>console.timeEnd()</code></a>."
 }
 ],
 "type": "module",
 "displayName": "Inspector only methods"
 }
 ],
 "type": "module",
 "displayName": "Console"
 }
 ]
}