Function: upperFirst()
ts
function upperFirst(value): string;Converts the first character of a string to uppercase. 将字符串的第一个字符转换为大写。
Parameters
| Parameter | Type | Description |
|---|---|---|
value | string | The string to modify / 要修改的字符串 |
Returns
string
The string with the first character in uppercase / 第一个字符为大写的字符串
Example
typescript
upperFirst('hello world') // => "Hello world"
upperFirst('HELLO WORLD') // => "HELLO WORLD"
upperFirst('hello') // => "Hello"
upperFirst('') // => ""
upperFirst('a') // => "A"
upperFirst('123abc') // => "123abc"
upperFirst('åpple') // "Åpple" (works with Unicode)Since
1.0.0