概述
Number.NaN
表示“非数字”(Not-A-Number)。和 NaN
相同。
不必创建一个 Number
实例来访问该属性,使用 Number.NaN
来访问该静态属性。
Number.NaN 属性的属性特性: |
|
---|---|
writable | false |
enumerable | false |
configurable | false |
规范
Specification | Status | Comment |
---|---|---|
ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.1. |
ECMAScript 5.1 (ECMA-262) Number.NaN |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) Number.NaN |
Standard | |
ECMAScript Latest Draft (ECMA-262) Number.NaN |
Draft |
浏览器兼容性
We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains.
Find out how you can help!
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |