| arg-is-not-number.js |
---
esid: sec-number.isnan
description: >
Return false if argument is not Number
info: |
Number.isNaN ( number )
1. If Type(number) is not Number, return false.
[...]
features: [Symbol]
--- |
874 |
| browser.js |
|
0 |
| length.js |
---
es6id: 20.1.2.4
description: >
Number.isNaN.length is 1.
info: |
Number.isNaN ( number )
17 ECMAScript Standard Built-in Objects:
Every built-in Function object, including constructors, has a length
property whose value is an integer. Unless otherwise specified, this
value is equal to the largest number of named arguments shown in the
subclause headings for the function description, including optional
parameters. However, rest parameters shown using the form “...name”
are not included in the default argument count.
Unless otherwise specified, the length property of a built-in Function
object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
[[Configurable]]: true }.
includes: [propertyHelper.js]
--- |
1052 |
| name.js |
---
es6id: 20.1.2.4
description: >
Number.isNaN.name is "isNaN".
info: |
Number.isNaN ( number )
17 ECMAScript Standard Built-in Objects:
Every built-in Function object, including constructors, that is not
identified as an anonymous function has a name property whose value
is a String.
Unless otherwise specified, the name property of a built-in Function
object, if it exists, has the attributes { [[Writable]]: false,
[[Enumerable]]: false, [[Configurable]]: true }.
includes: [propertyHelper.js]
--- |
815 |
| nan.js |
---
es6id: 20.1.2.4
author: Ryan Lewis
description: Number.IsNaN should return true if called with NaN.
--- |
326 |
| not-a-constructor.js |
---
esid: sec-ecmascript-standard-built-in-objects
description: >
Number.isNaN does not implement [[Construct]], is not new-able
info: |
ECMAScript Function Objects
Built-in function objects that are not identified as constructors do not
implement the [[Construct]] internal method unless otherwise specified in
the description of a particular function.
sec-evaluatenew
...
7. If IsConstructor(constructor) is false, throw a TypeError exception.
...
includes: [isConstructor.js]
features: [Reflect.construct, arrow-function]
--- |
870 |
| not-nan.js |
---
esid: sec-number.isnan
description: >
Return false if argument is not NaN
info: |
Number.isNaN ( number )
1. If Type(number) is not Number, return false.
2. If number is NaN, return true.
3. Otherwise, return false.
--- |
822 |
| prop-desc.js |
---
esid: sec-number.isnan
description: >
"isNaN" property of Number
info: |
17 ECMAScript Standard Built-in Objects:
Every other data property described in clauses 18 through 26 and in Annex B.2
has the attributes { [[Writable]]: true, [[Enumerable]]: false,
[[Configurable]]: true } unless otherwise specified.
includes: [propertyHelper.js]
--- |
622 |
| shell.js |
|
0 |