w3pop.com :: 网络学院 :: JavaScript :: JS函数参考
JS函数参考 
The top-level properties and functions can be used on all of the built-in JavaScript objects.
Top-level(顶级)属性和函数可以在JS所有的内建对象中使用
Top-level
FF: Firefox, N: Netscape, IE: Internet Explorer
FF:火狐，N:网景，IE
| Function 函数 |
Description 描述 |
FF | N | IE |
|---|---|---|---|---|
| decodeURI() | Decodes an encoded URI 为加密的URI进行解码 |
1 | 4 | 5.5 |
| decodeURIComponent() | Decodes an encoded URI component 为加密的URI组件解码 |
1 | 4 | 5.5 |
| encodeURI() | Encodes a string as a URI 将字符串加密为URI |
1 | 4 | 5.5 |
| encodeURIComponent() | Encodes a string as a URI component 将字符串加密为URI组件 |
1 | 4 | 5.5 |
| escape() | Encodes a string 加密一个字符串 |
1 | - | 3 |
| eval() | Evaluates a string and executes it as if it was script code 判断一个字符串并将其以脚本代码的形式执行 |
1 | 2 | 3 |
| isFinite() | Checks if a value is a finite number 检测一个值是否为一个有限数字 |
1 | 4 | 4 |
| isNaN() | Checks if a value is not a number 检测一个值是否不是一个有限数字 |
1 | 2 | 3 |
| Number() | Converts an object's value to a number 将一个对象的值转换为一个数字 |
1 | ||
| parseFloat() | Parses a string and returns a floating point number 将一个字符串解析为一个浮点数字 |
1 | 2 | 3 |
| parseInt() | Parses a string and returns an integer 将一个字符串解析为一个整数 |
1 | 2 | 3 |
| String() | Converts an object's value to a string 将一个对象值转换为一个字符串 |
1 | ||
| unescape() | Decodes a string encoded by escape() 使用escape()对一个字符串进行解码 |
1 | - | 3 |
Top-level Properties
Top-level 属性
| Property 属性 |
Description 描述 |
FF | N | IE |
|---|---|---|---|---|
| Infinity | A numeric value that represents positive or negative infinity 指定一个正负无穷大的数值 |
1 | 4 | 4 |
| NaN | Indicates that a value is "Not a Number" 指定一个 “非数字” 值 |
1 | 4 | 4 |
| undefined | Indicates that a variable has not been assigned a value 指定一个未被赋值的变量 |
1 | 4 | 5.5 |
评论 (1)
