JavaScript String valueOf() method
- 上一页 trimStart()
- 下一页 at()
- 返回上一层 Kitaun Nuna JavaScript String
Definition and usage
valueOf()
The method returns the original value of the string.
valueOf()
The method does not change the original string.
valueOf()
The method can be used to convert string objects to strings.
See also:
Note
valueOf()
The method is the default method of JavaScript string.
JavaScript 在内部使用它。
通常,您不会在代码中使用它。
Instance
Example 1
Get the value of the text:
let text = "Hello World!"; let result = text.valueOf();
It is equivalent to:
let text = "Hello World!"; let result = text;
Example 2
Get the value of the String object:
let text = new String("Hello World!"); let result = text.valueOf();
Syntax
string.valueOf()
Parameters
No parameters.
Return value
Type | Description |
---|---|
String | The original value of the string. |
Throws
Exception | Description |
---|---|
TypeError | Throws an exception when the object called is not a String. |
Browser support
valueOf()
Is ECMAScript1 (ES1) feature.
All browsers support ES1 (JavaScript 1997):
Chrome | IE | Edge | Firefox | Safari | Opera |
---|---|---|---|---|---|
Chrome | IE | Edge | Firefox | Safari | Opera |
支持 | 支持 | 支持 | 支持 | 支持 | 支持 |
- 上一页 trimStart()
- 下一页 at()
- 返回上一层 Kitaun Nuna JavaScript String