View Dror Gluska's profileI've wrote this helper project to determine the exact values for each function call.
for example:
- calling a function without any parameters yields the following Nan::NAN_METHOD_ARGS_TYPE info
1: {
2: "Length": 0,
3: "Callee": {
4: "IsUndefined": false,
5: "IsNull": false,
6: "IsTrue": false,
7: "IsFalse": false,
8: "IsName": false,
9: "IsString": false,
10: "IsSymbol": false,
11: "IsFunction": true,
12: "GetName": "test",
13: "GetInferredName": "",
14: "GetDebugName": "test",
15: "GetScriptLineNumber": -1,
16: "GetScriptColumnNumber": -1,
17: "IsBuiltin": true,
18: "ScriptId": 0,
19: "GetScriptOrigin": {
20: "Options": {
21: "IsEmbedderDebugScript": false,
22: "IsSharedCrossOrigin": false,
23: "IsOpaque": false,
24: "Flags": 0
25: }
26: },
27: "IsArray": false,
28: "IsObject": true,
29: "PropertyNames": [],
30: "GetConstructorName": "Function",
31: "InternalFieldCount": 0,
32: "HasNamedLookupInterceptor": false,
33: "HasIndexedLookupInterceptor": false,
34: "GetIdentityHash": 535707258,
35: "IsCallable": true,
36: "GetPrototype": {
37: "IsUndefined": false,
38: "IsNull": false,
39: "IsTrue": false,
40: "IsFalse": false,
41: "IsName": false,
42: "IsString": false,
43: "IsSymbol": false,
44: "IsFunction": true,
45: "IsArray": false,
46: "IsObject": true,
47: "IsBoolean": false,
48: "IsNumber": false,
49: "IsExternal": false,
50: "IsInt32": false,
51: "IsUint32": false,
52: "IsDate": false,
53: "IsArgumentsObject": false,
54: "IsBooleanObject": false,
55: "IsNumberObject": false,
56: "IsStringObject": false,
57: "IsSymbolObject": false,
58: "IsNativeError": false,
59: "IsRegExp": false,
60: "IsGeneratorFunction": false,
61: "IsGeneratorObject": false,
62: "IsPromise": false,
63: "IsMap": false,
64: "IsSet": false,
65: "IsMapIterator": false,
66: "IsSetIterator": false,
67: "IsWeakMap": false,
68: "IsWeakSet": false,
69: "IsArrayBuffer": false,
70: "IsArrayBufferView": false,
71: "IsTypedArray": false,
72: "IsUint8Array": false,
73: "IsUint8ClampedArray": false,
74: "IsInt8Array": false,
75: "IsUint16Array": false,
76: "IsInt16Array": false,
77: "IsUint32Array": false,
78: "IsInt32Array": false,
79: "IsFloat32Array": false,
80: "IsFloat64Array": false,
81: "IsDataView": false,
82: "IsSharedArrayBuffer": false,
83: "IsProxy": false,
84: "ToBoolean": true,
85: "ToNumber": null,
86: "ToString": "function () {}",
87: "ToDetailString": "function () {}",
88: "ToInteger": 0,
89: "ToUint32": 0,
90: "ToInt32": 0,
91: "BooleanValue": true,
92: "NumberValue": null,
93: "IntegerValue": 0,
94: "Uint32Value": 0,
95: "Int32Value": 0,
96: "PropertyNames": [],
97: "GetConstructorName": "Function",
98: "InternalFieldCount": 0,
99: "HasNamedLookupInterceptor": false,
100: "HasIndexedLookupInterceptor": false,
101: "GetIdentityHash": 2033009011,
102: "IsCallable": true
103: },
104: "IsBoolean": false,
105: "IsNumber": false,
106: "IsExternal": false,
107: "IsInt32": false,
108: "IsUint32": false,
109: "IsDate": false,
110: "IsArgumentsObject": false,
111: "IsBooleanObject": false,
112: "IsNumberObject": false,
113: "IsStringObject": false,
114: "IsSymbolObject": false,
115: "IsNativeError": false,
116: "IsRegExp": false,
117: "IsGeneratorFunction": false,
118: "IsGeneratorObject": false,
119: "IsPromise": false,
120: "IsMap": false,
121: "IsSet": false,
122: "IsMapIterator": false,
123: "IsSetIterator": false,
124: "IsWeakMap": false,
125: "IsWeakSet": false,
126: "IsArrayBuffer": false,
127: "IsArrayBufferView": false,
128: "IsTypedArray": false,
129: "IsUint8Array": false,
130: "IsUint8ClampedArray": false,
131: "IsInt8Array": false,
132: "IsUint16Array": false,
133: "IsInt16Array": false,
134: "IsUint32Array": false,
135: "IsInt32Array": false,
136: "IsFloat32Array": false,
137: "IsFloat64Array": false,
138: "IsDataView": false,
139: "IsSharedArrayBuffer": false,
140: "IsProxy": false,
141: "ToBoolean": true,
142: "ToNumber": null,
143: "ToString": "function test() { [native code] }",
144: "ToDetailString": "function test() { [native code] }",
145: "ToInteger": 0,
146: "ToUint32": 0,
147: "ToInt32": 0,
148: "BooleanValue": true,
149: "NumberValue": null,
150: "IntegerValue": 0,
151: "Uint32Value": 0,
152: "Int32Value": 0
153: },
154: "IsConstructCall": false,
155: "This": {
156: "IsUndefined": false,
157: "IsNull": false,
158: "IsTrue": false,
159: "IsFalse": false,
160: "IsName": false,
161: "IsString": false,
162: "IsSymbol": false,
163: "IsFunction": false,
164: "IsArray": false,
165: "IsObject": true,
166: "PropertyNames": [],
167: "GetConstructorName": "Object",
168: "InternalFieldCount": 0,
169: "HasNamedLookupInterceptor": false,
170: "HasIndexedLookupInterceptor": false,
171: "GetIdentityHash": 716126579,
172: "IsCallable": false,
173: "GetPrototype": {
174: "IsUndefined": false,
175: "IsNull": false,
176: "IsTrue": false,
177: "IsFalse": false,
178: "IsName": false,
179: "IsString": false,
180: "IsSymbol": false,
181: "IsFunction": false,
182: "IsArray": false,
183: "IsObject": true,
184: "IsBoolean": false,
185: "IsNumber": false,
186: "IsExternal": false,
187: "IsInt32": false,
188: "IsUint32": false,
189: "IsDate": false,
190: "IsArgumentsObject": false,
191: "IsBooleanObject": false,
192: "IsNumberObject": false,
193: "IsStringObject": false,
194: "IsSymbolObject": false,
195: "IsNativeError": false,
196: "IsRegExp": false,
197: "IsGeneratorFunction": false,
198: "IsGeneratorObject": false,
199: "IsPromise": false,
200: "IsMap": false,
201: "IsSet": false,
202: "IsMapIterator": false,
203: "IsSetIterator": false,
204: "IsWeakMap": false,
205: "IsWeakSet": false,
206: "IsArrayBuffer": false,
207: "IsArrayBufferView": false,
208: "IsTypedArray": false,
209: "IsUint8Array": false,
210: "IsUint8ClampedArray": false,
211: "IsInt8Array": false,
212: "IsUint16Array": false,
213: "IsInt16Array": false,
214: "IsUint32Array": false,
215: "IsInt32Array": false,
216: "IsFloat32Array": false,
217: "IsFloat64Array": false,
218: "IsDataView": false,
219: "IsSharedArrayBuffer": false,
220: "IsProxy": false,
221: "ToBoolean": true,
222: "ToNumber": null,
223: "ToString": "[object Object]",
224: "ToDetailString": "#<Object>",
225: "ToObject": {},
226: "ToInteger": 0,
227: "ToUint32": 0,
228: "ToInt32": 0,
229: "BooleanValue": true,
230: "NumberValue": null,
231: "IntegerValue": 0,
232: "Uint32Value": 0,
233: "Int32Value": 0,
234: "PropertyNames": [],
235: "GetConstructorName": "Object",
236: "InternalFieldCount": 0,
237: "HasNamedLookupInterceptor": false,
238: "HasIndexedLookupInterceptor": false,
239: "GetIdentityHash": 1536014436,
240: "IsCallable": false
241: },
242: "IsBoolean": false,
243: "IsNumber": false,
244: "IsExternal": false,
245: "IsInt32": false,
246: "IsUint32": false,
247: "IsDate": false,
248: "IsArgumentsObject": false,
249: "IsBooleanObject": false,
250: "IsNumberObject": false,
251: "IsStringObject": false,
252: "IsSymbolObject": false,
253: "IsNativeError": false,
254: "IsRegExp": false,
255: "IsGeneratorFunction": false,
256: "IsGeneratorObject": false,
257: "IsPromise": false,
258: "IsMap": false,
259: "IsSet": false,
260: "IsMapIterator": false,
261: "IsSetIterator": false,
262: "IsWeakMap": false,
263: "IsWeakSet": false,
264: "IsArrayBuffer": false,
265: "IsArrayBufferView": false,
266: "IsTypedArray": false,
267: "IsUint8Array": false,
268: "IsUint8ClampedArray": false,
269: "IsInt8Array": false,
270: "IsUint16Array": false,
271: "IsInt16Array": false,
272: "IsUint32Array": false,
273: "IsInt32Array": false,
274: "IsFloat32Array": false,
275: "IsFloat64Array": false,
276: "IsDataView": false,
277: "IsSharedArrayBuffer": false,
278: "IsProxy": false,
279: "ToBoolean": true,
280: "ToNumber": null,
281: "ToString": "[object Object]",
282: "ToDetailString": "#<Object>",
283: "ToObject": {},
284: "ToInteger": 0,
285: "ToUint32": 0,
286: "ToInt32": 0,
287: "BooleanValue": true,
288: "NumberValue": null,
289: "IntegerValue": 0,
290: "Uint32Value": 0,
291: "Int32Value": 0
292: },
293: "Info": []
294: } - calling a member function (prototype) yields:
1: {
2: "Length": 0,
3: "Callee": {
4: "IsUndefined": false,
5: "IsNull": false,
6: "IsTrue": false,
7: "IsFalse": false,
8: "IsName": false,
9: "IsString": false,
10: "IsSymbol": false,
11: "IsFunction": true,
12: "GetName": "test_member_function",
13: "GetInferredName": "",
14: "GetDebugName": "test_member_function",
15: "GetScriptLineNumber": -1,
16: "GetScriptColumnNumber": -1,
17: "IsBuiltin": true,
18: "ScriptId": 0,
19: "GetScriptOrigin": {
20: "Options": {
21: "IsEmbedderDebugScript": false,
22: "IsSharedCrossOrigin": false,
23: "IsOpaque": false,
24: "Flags": 0
25: }
26: },
27: "IsArray": false,
28: "IsObject": true,
29: "PropertyNames": [],
30: "GetConstructorName": "Function",
31: "InternalFieldCount": 0,
32: "HasNamedLookupInterceptor": false,
33: "HasIndexedLookupInterceptor": false,
34: "GetIdentityHash": 1864397598,
35: "IsCallable": true,
36: "GetPrototype": {
37: "IsUndefined": false,
38: "IsNull": false,
39: "IsTrue": false,
40: "IsFalse": false,
41: "IsName": false,
42: "IsString": false,
43: "IsSymbol": false,
44: "IsFunction": true,
45: "IsArray": false,
46: "IsObject": true,
47: "IsBoolean": false,
48: "IsNumber": false,
49: "IsExternal": false,
50: "IsInt32": false,
51: "IsUint32": false,
52: "IsDate": false,
53: "IsArgumentsObject": false,
54: "IsBooleanObject": false,
55: "IsNumberObject": false,
56: "IsStringObject": false,
57: "IsSymbolObject": false,
58: "IsNativeError": false,
59: "IsRegExp": false,
60: "IsGeneratorFunction": false,
61: "IsGeneratorObject": false,
62: "IsPromise": false,
63: "IsMap": false,
64: "IsSet": false,
65: "IsMapIterator": false,
66: "IsSetIterator": false,
67: "IsWeakMap": false,
68: "IsWeakSet": false,
69: "IsArrayBuffer": false,
70: "IsArrayBufferView": false,
71: "IsTypedArray": false,
72: "IsUint8Array": false,
73: "IsUint8ClampedArray": false,
74: "IsInt8Array": false,
75: "IsUint16Array": false,
76: "IsInt16Array": false,
77: "IsUint32Array": false,
78: "IsInt32Array": false,
79: "IsFloat32Array": false,
80: "IsFloat64Array": false,
81: "IsDataView": false,
82: "IsSharedArrayBuffer": false,
83: "IsProxy": false,
84: "ToBoolean": true,
85: "ToNumber": null,
86: "ToString": "function () {}",
87: "ToDetailString": "function () {}",
88: "ToInteger": 0,
89: "ToUint32": 0,
90: "ToInt32": 0,
91: "BooleanValue": true,
92: "NumberValue": null,
93: "IntegerValue": 0,
94: "Uint32Value": 0,
95: "Int32Value": 0,
96: "PropertyNames": [],
97: "GetConstructorName": "Function",
98: "InternalFieldCount": 0,
99: "HasNamedLookupInterceptor": false,
100: "HasIndexedLookupInterceptor": false,
101: "GetIdentityHash": 1117981863,
102: "IsCallable": true
103: },
104: "IsBoolean": false,
105: "IsNumber": false,
106: "IsExternal": false,
107: "IsInt32": false,
108: "IsUint32": false,
109: "IsDate": false,
110: "IsArgumentsObject": false,
111: "IsBooleanObject": false,
112: "IsNumberObject": false,
113: "IsStringObject": false,
114: "IsSymbolObject": false,
115: "IsNativeError": false,
116: "IsRegExp": false,
117: "IsGeneratorFunction": false,
118: "IsGeneratorObject": false,
119: "IsPromise": false,
120: "IsMap": false,
121: "IsSet": false,
122: "IsMapIterator": false,
123: "IsSetIterator": false,
124: "IsWeakMap": false,
125: "IsWeakSet": false,
126: "IsArrayBuffer": false,
127: "IsArrayBufferView": false,
128: "IsTypedArray": false,
129: "IsUint8Array": false,
130: "IsUint8ClampedArray": false,
131: "IsInt8Array": false,
132: "IsUint16Array": false,
133: "IsInt16Array": false,
134: "IsUint32Array": false,
135: "IsInt32Array": false,
136: "IsFloat32Array": false,
137: "IsFloat64Array": false,
138: "IsDataView": false,
139: "IsSharedArrayBuffer": false,
140: "IsProxy": false,
141: "ToBoolean": true,
142: "ToNumber": null,
143: "ToString": "function test_member_function() { [native code] }",
144: "ToDetailString": "function test_member_function() { [native code] }",
145: "ToInteger": 0,
146: "ToUint32": 0,
147: "ToInt32": 0,
148: "BooleanValue": true,
149: "NumberValue": null,
150: "IntegerValue": 0,
151: "Uint32Value": 0,
152: "Int32Value": 0
153: },
154: "IsConstructCall": false,
155: "This": {
156: "IsUndefined": false,
157: "IsNull": false,
158: "IsTrue": false,
159: "IsFalse": false,
160: "IsName": false,
161: "IsString": false,
162: "IsSymbol": false,
163: "IsFunction": false,
164: "IsArray": false,
165: "IsObject": true,
166: "PropertyNames": [],
167: "GetConstructorName": "base_class",
168: "InternalFieldCount": 1,
169: "HasNamedLookupInterceptor": false,
170: "HasIndexedLookupInterceptor": false,
171: "GetIdentityHash": 1554520219,
172: "IsCallable": false,
173: "GetPrototype": {
174: "IsUndefined": false,
175: "IsNull": false,
176: "IsTrue": false,
177: "IsFalse": false,
178: "IsName": false,
179: "IsString": false,
180: "IsSymbol": false,
181: "IsFunction": false,
182: "IsArray": false,
183: "IsObject": true,
184: "IsBoolean": false,
185: "IsNumber": false,
186: "IsExternal": false,
187: "IsInt32": false,
188: "IsUint32": false,
189: "IsDate": false,
190: "IsArgumentsObject": false,
191: "IsBooleanObject": false,
192: "IsNumberObject": false,
193: "IsStringObject": false,
194: "IsSymbolObject": false,
195: "IsNativeError": false,
196: "IsRegExp": false,
197: "IsGeneratorFunction": false,
198: "IsGeneratorObject": false,
199: "IsPromise": false,
200: "IsMap": false,
201: "IsSet": false,
202: "IsMapIterator": false,
203: "IsSetIterator": false,
204: "IsWeakMap": false,
205: "IsWeakSet": false,
206: "IsArrayBuffer": false,
207: "IsArrayBufferView": false,
208: "IsTypedArray": false,
209: "IsUint8Array": false,
210: "IsUint8ClampedArray": false,
211: "IsInt8Array": false,
212: "IsUint16Array": false,
213: "IsInt16Array": false,
214: "IsUint32Array": false,
215: "IsInt32Array": false,
216: "IsFloat32Array": false,
217: "IsFloat64Array": false,
218: "IsDataView": false,
219: "IsSharedArrayBuffer": false,
220: "IsProxy": false,
221: "ToBoolean": true,
222: "ToNumber": null,
223: "ToString": "[object Object]",
224: "ToDetailString": "#<base_class>",
225: "ToObject": {},
226: "ToInteger": 0,
227: "ToUint32": 0,
228: "ToInt32": 0,
229: "BooleanValue": true,
230: "NumberValue": null,
231: "IntegerValue": 0,
232: "Uint32Value": 0,
233: "Int32Value": 0,
234: "PropertyNames": [],
235: "GetConstructorName": "Object",
236: "InternalFieldCount": 0,
237: "HasNamedLookupInterceptor": false,
238: "HasIndexedLookupInterceptor": false,
239: "GetIdentityHash": 1008670604,
240: "IsCallable": false
241: },
242: "IsBoolean": false,
243: "IsNumber": false,
244: "IsExternal": false,
245: "IsInt32": false,
246: "IsUint32": false,
247: "IsDate": false,
248: "IsArgumentsObject": false,
249: "IsBooleanObject": false,
250: "IsNumberObject": false,
251: "IsStringObject": false,
252: "IsSymbolObject": false,
253: "IsNativeError": false,
254: "IsRegExp": false,
255: "IsGeneratorFunction": false,
256: "IsGeneratorObject": false,
257: "IsPromise": false,
258: "IsMap": false,
259: "IsSet": false,
260: "IsMapIterator": false,
261: "IsSetIterator": false,
262: "IsWeakMap": false,
263: "IsWeakSet": false,
264: "IsArrayBuffer": false,
265: "IsArrayBufferView": false,
266: "IsTypedArray": false,
267: "IsUint8Array": false,
268: "IsUint8ClampedArray": false,
269: "IsInt8Array": false,
270: "IsUint16Array": false,
271: "IsInt16Array": false,
272: "IsUint32Array": false,
273: "IsInt32Array": false,
274: "IsFloat32Array": false,
275: "IsFloat64Array": false,
276: "IsDataView": false,
277: "IsSharedArrayBuffer": false,
278: "IsProxy": false,
279: "ToBoolean": true,
280: "ToNumber": null,
281: "ToString": "[object base_class]",
282: "ToDetailString": "#<base_class>",
283: "ToObject": {},
284: "ToInteger": 0,
285: "ToUint32": 0,
286: "ToInt32": 0,
287: "BooleanValue": true,
288: "NumberValue": null,
289: "IntegerValue": 0,
290: "Uint32Value": 0,
291: "Int32Value": 0
292: },
293: "Info": []
294: } - calling a "static" function yields:
1: {
2: "Length": 0,
3: "Callee": {
4: "IsUndefined": false,
5: "IsNull": false,
6: "IsTrue": false,
7: "IsFalse": false,
8: "IsName": false,
9: "IsString": false,
10: "IsSymbol": false,
11: "IsFunction": true,
12: "GetName": "test_static_function",
13: "GetInferredName": "",
14: "GetDebugName": "test_static_function",
15: "GetScriptLineNumber": -1,
16: "GetScriptColumnNumber": -1,
17: "IsBuiltin": true,
18: "ScriptId": 0,
19: "GetScriptOrigin": {
20: "Options": {
21: "IsEmbedderDebugScript": false,
22: "IsSharedCrossOrigin": false,
23: "IsOpaque": false,
24: "Flags": 0
25: }
26: },
27: "IsArray": false,
28: "IsObject": true,
29: "PropertyNames": [],
30: "GetConstructorName": "Function",
31: "InternalFieldCount": 0,
32: "HasNamedLookupInterceptor": false,
33: "HasIndexedLookupInterceptor": false,
34: "GetIdentityHash": 994160730,
35: "IsCallable": true,
36: "GetPrototype": {
37: "IsUndefined": false,
38: "IsNull": false,
39: "IsTrue": false,
40: "IsFalse": false,
41: "IsName": false,
42: "IsString": false,
43: "IsSymbol": false,
44: "IsFunction": true,
45: "IsArray": false,
46: "IsObject": true,
47: "IsBoolean": false,
48: "IsNumber": false,
49: "IsExternal": false,
50: "IsInt32": false,
51: "IsUint32": false,
52: "IsDate": false,
53: "IsArgumentsObject": false,
54: "IsBooleanObject": false,
55: "IsNumberObject": false,
56: "IsStringObject": false,
57: "IsSymbolObject": false,
58: "IsNativeError": false,
59: "IsRegExp": false,
60: "IsGeneratorFunction": false,
61: "IsGeneratorObject": false,
62: "IsPromise": false,
63: "IsMap": false,
64: "IsSet": false,
65: "IsMapIterator": false,
66: "IsSetIterator": false,
67: "IsWeakMap": false,
68: "IsWeakSet": false,
69: "IsArrayBuffer": false,
70: "IsArrayBufferView": false,
71: "IsTypedArray": false,
72: "IsUint8Array": false,
73: "IsUint8ClampedArray": false,
74: "IsInt8Array": false,
75: "IsUint16Array": false,
76: "IsInt16Array": false,
77: "IsUint32Array": false,
78: "IsInt32Array": false,
79: "IsFloat32Array": false,
80: "IsFloat64Array": false,
81: "IsDataView": false,
82: "IsSharedArrayBuffer": false,
83: "IsProxy": false,
84: "ToBoolean": true,
85: "ToNumber": null,
86: "ToString": "function () {}",
87: "ToDetailString": "function () {}",
88: "ToInteger": 0,
89: "ToUint32": 0,
90: "ToInt32": 0,
91: "BooleanValue": true,
92: "NumberValue": null,
93: "IntegerValue": 0,
94: "Uint32Value": 0,
95: "Int32Value": 0,
96: "PropertyNames": [],
97: "GetConstructorName": "Function",
98: "InternalFieldCount": 0,
99: "HasNamedLookupInterceptor": false,
100: "HasIndexedLookupInterceptor": false,
101: "GetIdentityHash": 1329899702,
102: "IsCallable": true
103: },
104: "IsBoolean": false,
105: "IsNumber": false,
106: "IsExternal": false,
107: "IsInt32": false,
108: "IsUint32": false,
109: "IsDate": false,
110: "IsArgumentsObject": false,
111: "IsBooleanObject": false,
112: "IsNumberObject": false,
113: "IsStringObject": false,
114: "IsSymbolObject": false,
115: "IsNativeError": false,
116: "IsRegExp": false,
117: "IsGeneratorFunction": false,
118: "IsGeneratorObject": false,
119: "IsPromise": false,
120: "IsMap": false,
121: "IsSet": false,
122: "IsMapIterator": false,
123: "IsSetIterator": false,
124: "IsWeakMap": false,
125: "IsWeakSet": false,
126: "IsArrayBuffer": false,
127: "IsArrayBufferView": false,
128: "IsTypedArray": false,
129: "IsUint8Array": false,
130: "IsUint8ClampedArray": false,
131: "IsInt8Array": false,
132: "IsUint16Array": false,
133: "IsInt16Array": false,
134: "IsUint32Array": false,
135: "IsInt32Array": false,
136: "IsFloat32Array": false,
137: "IsFloat64Array": false,
138: "IsDataView": false,
139: "IsSharedArrayBuffer": false,
140: "IsProxy": false,
141: "ToBoolean": true,
142: "ToNumber": null,
143: "ToString": "function test_static_function() { [native code] }",
144: "ToDetailString": "function test_static_function() { [native code] }",
145: "ToInteger": 0,
146: "ToUint32": 0,
147: "ToInt32": 0,
148: "BooleanValue": true,
149: "NumberValue": null,
150: "IntegerValue": 0,
151: "Uint32Value": 0,
152: "Int32Value": 0
153: },
154: "IsConstructCall": false,
155: "This": {
156: "IsUndefined": false,
157: "IsNull": false,
158: "IsTrue": false,
159: "IsFalse": false,
160: "IsName": false,
161: "IsString": false,
162: "IsSymbol": false,
163: "IsFunction": true,
164: "GetName": "base_class",
165: "GetInferredName": "",
166: "GetDebugName": "base_class",
167: "GetScriptLineNumber": -1,
168: "GetScriptColumnNumber": -1,
169: "IsBuiltin": true,
170: "ScriptId": 0,
171: "GetScriptOrigin": {
172: "Options": {
173: "IsEmbedderDebugScript": false,
174: "IsSharedCrossOrigin": false,
175: "IsOpaque": false,
176: "Flags": 0
177: }
178: },
179: "IsArray": false,
180: "IsObject": true,
181: "PropertyNames": [],
182: "GetConstructorName": "Function",
183: "InternalFieldCount": 0,
184: "HasNamedLookupInterceptor": false,
185: "HasIndexedLookupInterceptor": false,
186: "GetIdentityHash": 612374797,
187: "IsCallable": true,
188: "GetPrototype": {
189: "IsUndefined": false,
190: "IsNull": false,
191: "IsTrue": false,
192: "IsFalse": false,
193: "IsName": false,
194: "IsString": false,
195: "IsSymbol": false,
196: "IsFunction": true,
197: "IsArray": false,
198: "IsObject": true,
199: "IsBoolean": false,
200: "IsNumber": false,
201: "IsExternal": false,
202: "IsInt32": false,
203: "IsUint32": false,
204: "IsDate": false,
205: "IsArgumentsObject": false,
206: "IsBooleanObject": false,
207: "IsNumberObject": false,
208: "IsStringObject": false,
209: "IsSymbolObject": false,
210: "IsNativeError": false,
211: "IsRegExp": false,
212: "IsGeneratorFunction": false,
213: "IsGeneratorObject": false,
214: "IsPromise": false,
215: "IsMap": false,
216: "IsSet": false,
217: "IsMapIterator": false,
218: "IsSetIterator": false,
219: "IsWeakMap": false,
220: "IsWeakSet": false,
221: "IsArrayBuffer": false,
222: "IsArrayBufferView": false,
223: "IsTypedArray": false,
224: "IsUint8Array": false,
225: "IsUint8ClampedArray": false,
226: "IsInt8Array": false,
227: "IsUint16Array": false,
228: "IsInt16Array": false,
229: "IsUint32Array": false,
230: "IsInt32Array": false,
231: "IsFloat32Array": false,
232: "IsFloat64Array": false,
233: "IsDataView": false,
234: "IsSharedArrayBuffer": false,
235: "IsProxy": false,
236: "ToBoolean": true,
237: "ToNumber": null,
238: "ToString": "function () {}",
239: "ToDetailString": "function () {}",
240: "ToInteger": 0,
241: "ToUint32": 0,
242: "ToInt32": 0,
243: "BooleanValue": true,
244: "NumberValue": null,
245: "IntegerValue": 0,
246: "Uint32Value": 0,
247: "Int32Value": 0,
248: "PropertyNames": [],
249: "GetConstructorName": "Function",
250: "InternalFieldCount": 0,
251: "HasNamedLookupInterceptor": false,
252: "HasIndexedLookupInterceptor": false,
253: "GetIdentityHash": 1329899702,
254: "IsCallable": true
255: },
256: "IsBoolean": false,
257: "IsNumber": false,
258: "IsExternal": false,
259: "IsInt32": false,
260: "IsUint32": false,
261: "IsDate": false,
262: "IsArgumentsObject": false,
263: "IsBooleanObject": false,
264: "IsNumberObject": false,
265: "IsStringObject": false,
266: "IsSymbolObject": false,
267: "IsNativeError": false,
268: "IsRegExp": false,
269: "IsGeneratorFunction": false,
270: "IsGeneratorObject": false,
271: "IsPromise": false,
272: "IsMap": false,
273: "IsSet": false,
274: "IsMapIterator": false,
275: "IsSetIterator": false,
276: "IsWeakMap": false,
277: "IsWeakSet": false,
278: "IsArrayBuffer": false,
279: "IsArrayBufferView": false,
280: "IsTypedArray": false,
281: "IsUint8Array": false,
282: "IsUint8ClampedArray": false,
283: "IsInt8Array": false,
284: "IsUint16Array": false,
285: "IsInt16Array": false,
286: "IsUint32Array": false,
287: "IsInt32Array": false,
288: "IsFloat32Array": false,
289: "IsFloat64Array": false,
290: "IsDataView": false,
291: "IsSharedArrayBuffer": false,
292: "IsProxy": false,
293: "ToBoolean": true,
294: "ToNumber": null,
295: "ToString": "function base_class() { [native code] }",
296: "ToDetailString": "function base_class() { [native code] }",
297: "ToInteger": 0,
298: "ToUint32": 0,
299: "ToInt32": 0,
300: "BooleanValue": true,
301: "NumberValue": null,
302: "IntegerValue": 0,
303: "Uint32Value": 0,
304: "Int32Value": 0
305: },
306: "Info": []
307: } There are many more parameters to explore, how does it show when an object is a child of another object? is there really an "int64" value in v8? spoiler: no. Can you do a ToInt32 on float numbers? What's the value of NumberValue for a particular string?
Have fun exploring :-)