Function shortToLongHex

shortToLongHex(val, prefix?): string
Converts a shorthand hex string to a longhand hex string.

Example
```
shortToLongHex('#fff') // Returns '#ffffff'
shortToLongHex('0x000', '0x') // Returns '0x000000'
```
Parameters
- val: string
  
  Shorthand hex string.
- prefix: HexStringPrefix = '#'
  
  Prefix of hex string.
Returns string
Longhand hex string.
- Defined in core/utils.ts:171