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console: mark special console properties as non-enumerable
This makes sure internal console properties are not visible during default inspection. They are still visible when inspecting the console with `showHidden` set to `true`. These properties are confusing while working with the REPL and easily show up. Signed-off-by: Ruben Bridgewater <ruben@bridgewater.de> PR-URL: #33524 Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
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‎lib/internal/console/constructor.js‎

Lines changed: 147 additions & 129 deletions
Original file line numberDiff line numberDiff line change
@@ -155,68 +155,156 @@ ObjectDefineProperty(Console, SymbolHasInstance, {
155155
}
156156
});
157157

158-
// Eager version for the Console constructor
159-
Console.prototype[kBindStreamsEager] = function(stdout, stderr) {
160-
ObjectDefineProperties(this, {
161-
'_stdout': { ...consolePropAttributes, value: stdout },
162-
'_stderr': { ...consolePropAttributes, value: stderr }
163-
});
164-
};
158+
const kColorInspectOptions = { colors: true };
159+
const kNoColorInspectOptions = {};
165160

166-
// Lazily load the stdout and stderr from an object so we don't
167-
// create the stdio streams when they are not even accessed
168-
Console.prototype[kBindStreamsLazy] = function(object) {
169-
let stdout;
170-
let stderr;
171-
ObjectDefineProperties(this, {
172-
'_stdout': {
173-
enumerable: false,
174-
configurable: true,
175-
get() {
176-
if (!stdout) stdout = object.stdout;
177-
return stdout;
178-
},
179-
set(value) { stdout = value; }
180-
},
181-
'_stderr': {
182-
enumerable: false,
183-
configurable: true,
184-
get() {
185-
if (!stderr) { stderr = object.stderr; }
186-
return stderr;
187-
},
188-
set(value) { stderr = value; }
161+
ObjectDefineProperties(Console.prototype, {
162+
[kBindStreamsEager]: {
163+
...consolePropAttributes,
164+
// Eager version for the Console constructor
165+
value: function(stdout, stderr) {
166+
ObjectDefineProperties(this, {
167+
'_stdout': { ...consolePropAttributes, value: stdout },
168+
'_stderr': { ...consolePropAttributes, value: stderr }
169+
});
189170
}
190-
});
191-
};
171+
},
172+
[kBindStreamsLazy]: {
173+
...consolePropAttributes,
174+
// Lazily load the stdout and stderr from an object so we don't
175+
// create the stdio streams when they are not even accessed
176+
value: function(object) {
177+
let stdout;
178+
let stderr;
179+
ObjectDefineProperties(this, {
180+
'_stdout': {
181+
enumerable: false,
182+
configurable: true,
183+
get() {
184+
if (!stdout) stdout = object.stdout;
185+
return stdout;
186+
},
187+
set(value) { stdout = value; }
188+
},
189+
'_stderr': {
190+
enumerable: false,
191+
configurable: true,
192+
get() {
193+
if (!stderr) { stderr = object.stderr; }
194+
return stderr;
195+
},
196+
set(value) { stderr = value; }
197+
}
198+
});
199+
}
200+
},
201+
[kBindProperties]: {
202+
...consolePropAttributes,
203+
value: function(ignoreErrors, colorMode, groupIndentation = 2) {
204+
ObjectDefineProperties(this, {
205+
'_stdoutErrorHandler': {
206+
...consolePropAttributes,
207+
value: createWriteErrorHandler(this, kUseStdout)
208+
},
209+
'_stderrErrorHandler': {
210+
...consolePropAttributes,
211+
value: createWriteErrorHandler(this, kUseStderr)
212+
},
213+
'_ignoreErrors': {
214+
...consolePropAttributes,
215+
value: Boolean(ignoreErrors)
216+
},
217+
'_times': { ...consolePropAttributes, value: new Map() },
218+
// Corresponds to https://console.spec.whatwg.org/#count-map
219+
[kCounts]: { ...consolePropAttributes, value: new Map() },
220+
[kColorMode]: { ...consolePropAttributes, value: colorMode },
221+
[kIsConsole]: { ...consolePropAttributes, value: true },
222+
[kGroupIndent]: { ...consolePropAttributes, value: '' },
223+
[kGroupIndentationWidth]: {
224+
...consolePropAttributes,
225+
value: groupIndentation
226+
},
227+
});
228+
}
229+
},
230+
[kWriteToConsole]: {
231+
...consolePropAttributes,
232+
value: function(streamSymbol, string) {
233+
const ignoreErrors = this._ignoreErrors;
234+
const groupIndent = this[kGroupIndent];
235+
236+
const useStdout = streamSymbol === kUseStdout;
237+
const stream = useStdout ? this._stdout : this._stderr;
238+
const errorHandler = useStdout ?
239+
this._stdoutErrorHandler : this._stderrErrorHandler;
240+
241+
if (groupIndent.length !== 0) {
242+
if (string.includes('\n')) {
243+
string = string.replace(/\n/g, `\n${groupIndent}`);
244+
}
245+
string = groupIndent + string;
246+
}
247+
string += '\n';
248+
249+
if (ignoreErrors === false) return stream.write(string);
250+
251+
// There may be an error occurring synchronously (e.g. for files or TTYs
252+
// on POSIX systems) or asynchronously (e.g. pipes on POSIX systems), so
253+
// handle both situations.
254+
try {
255+
// Add and later remove a noop error handler to catch synchronous
256+
// errors.
257+
if (stream.listenerCount('error') === 0)
258+
stream.once('error', noop);
259+
260+
stream.write(string, errorHandler);
261+
} catch (e) {
262+
// Console is a debugging utility, so it swallowing errors is not
263+
// desirable even in edge cases such as low stack space.
264+
if (isStackOverflowError(e))
265+
throw e;
266+
// Sorry, there's no proper way to pass along the error here.
267+
} finally {
268+
stream.removeListener('error', noop);
269+
}
270+
}
271+
},
272+
[kGetInspectOptions]: {
273+
...consolePropAttributes,
274+
value: function(stream) {
275+
let color = this[kColorMode];
276+
if (color === 'auto') {
277+
color = stream.isTTY && (
278+
typeof stream.getColorDepth === 'function' ?
279+
stream.getColorDepth() > 2 : true);
280+
}
192281

193-
Console.prototype[kBindProperties] = function(ignoreErrors, colorMode,
194-
groupIndentation = 2) {
195-
ObjectDefineProperties(this, {
196-
'_stdoutErrorHandler': {
197-
...consolePropAttributes,
198-
value: createWriteErrorHandler(this, kUseStdout)
199-
},
200-
'_stderrErrorHandler': {
201-
...consolePropAttributes,
202-
value: createWriteErrorHandler(this, kUseStderr)
203-
},
204-
'_ignoreErrors': {
205-
...consolePropAttributes,
206-
value: Boolean(ignoreErrors)
207-
},
208-
'_times': { ...consolePropAttributes, value: new Map() },
209-
// Corresponds to https://console.spec.whatwg.org/#count-map
210-
[kCounts]: { ...consolePropAttributes, value: new Map() },
211-
[kColorMode]: { ...consolePropAttributes, value: colorMode },
212-
[kIsConsole]: { ...consolePropAttributes, value: true },
213-
[kGroupIndent]: { ...consolePropAttributes, value: '' },
214-
[kGroupIndentationWidth]: {
215-
...consolePropAttributes,
216-
value: groupIndentation
217-
},
218-
});
219-
};
282+
const options = optionsMap.get(this);
283+
if (options) {
284+
if (options.colors === undefined) {
285+
options.colors = color;
286+
}
287+
return options;
288+
}
289+
290+
return color ? kColorInspectOptions : kNoColorInspectOptions;
291+
}
292+
},
293+
[kFormatForStdout]: {
294+
...consolePropAttributes,
295+
value: function(args) {
296+
const opts = this[kGetInspectOptions](this._stdout);
297+
return formatWithOptions(opts, ...args);
298+
}
299+
},
300+
[kFormatForStderr]: {
301+
...consolePropAttributes,
302+
value: function(args) {
303+
const opts = this[kGetInspectOptions](this._stderr);
304+
return formatWithOptions(opts, ...args);
305+
}
306+
},
307+
});
220308

221309
// Make a function that can serve as the callback passed to `stream.write()`.
222310
function createWriteErrorHandler(instance, streamSymbol) {
@@ -239,76 +327,6 @@ function createWriteErrorHandler(instance, streamSymbol) {
239327
};
240328
}
241329

242-
Console.prototype[kWriteToConsole] = function(streamSymbol, string) {
243-
const ignoreErrors = this._ignoreErrors;
244-
const groupIndent = this[kGroupIndent];
245-
246-
const useStdout = streamSymbol === kUseStdout;
247-
const stream = useStdout ? this._stdout : this._stderr;
248-
const errorHandler = useStdout ?
249-
this._stdoutErrorHandler : this._stderrErrorHandler;
250-
251-
if (groupIndent.length !== 0) {
252-
if (string.includes('\n')) {
253-
string = string.replace(/\n/g, `\n${groupIndent}`);
254-
}
255-
string = groupIndent + string;
256-
}
257-
string += '\n';
258-
259-
if (ignoreErrors === false) return stream.write(string);
260-
261-
// There may be an error occurring synchronously (e.g. for files or TTYs
262-
// on POSIX systems) or asynchronously (e.g. pipes on POSIX systems), so
263-
// handle both situations.
264-
try {
265-
// Add and later remove a noop error handler to catch synchronous errors.
266-
if (stream.listenerCount('error') === 0)
267-
stream.once('error', noop);
268-
269-
stream.write(string, errorHandler);
270-
} catch (e) {
271-
// Console is a debugging utility, so it swallowing errors is not desirable
272-
// even in edge cases such as low stack space.
273-
if (isStackOverflowError(e))
274-
throw e;
275-
// Sorry, there's no proper way to pass along the error here.
276-
} finally {
277-
stream.removeListener('error', noop);
278-
}
279-
};
280-
281-
const kColorInspectOptions = { colors: true };
282-
const kNoColorInspectOptions = {};
283-
Console.prototype[kGetInspectOptions] = function(stream) {
284-
let color = this[kColorMode];
285-
if (color === 'auto') {
286-
color = stream.isTTY && (
287-
typeof stream.getColorDepth === 'function' ?
288-
stream.getColorDepth() > 2 : true);
289-
}
290-
291-
const options = optionsMap.get(this);
292-
if (options) {
293-
if (options.colors === undefined) {
294-
options.colors = color;
295-
}
296-
return options;
297-
}
298-
299-
return color ? kColorInspectOptions : kNoColorInspectOptions;
300-
};
301-
302-
Console.prototype[kFormatForStdout] = function(args) {
303-
const opts = this[kGetInspectOptions](this._stdout);
304-
return formatWithOptions(opts, ...args);
305-
};
306-
307-
Console.prototype[kFormatForStderr] = function(args) {
308-
const opts = this[kGetInspectOptions](this._stderr);
309-
return formatWithOptions(opts, ...args);
310-
};
311-
312330
const consoleMethods = {
313331
log(...args) {
314332
this[kWriteToConsole](kUseStdout, this[kFormatForStdout](args));

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