Function isAscii

isAscii(string: string): boolean
Checks if string contains only ASCII characters.
Parameters
- string: string
  The string to check.
Returns boolean
Returns true if string contains only ASCII characters, else false.
Example
```
isAscii('Hello, world!')
// => true

isAscii('こんにちは世界！')
// => false
```
- Defined in isAscii.ts:30