isHex ​

Checks whether the value is a hex value or not.

Install ​

import { isHex } from 'viem'

Usage ​

import { isHex } from 'viem'

isHex('0x1a4')
// true

isHex('0x1a4z')
isHex('foo')
// false

Returns ​

boolean

Returns truthy is the value is a hex value.

Parameters ​

value ​

• Type: unknown

The value to check.

isHex(
  '0x1a4' 
)
// true

options.strict ​

• Type: boolean
• Default: true

When enabled, checks if the value strictly consists of only hex characters ("0x[0-9a-fA-F]*"). When disabled, checks if the value loosely matches hex format (value.startsWith('0x')).

isHex('0xlol', { strict: false })
// true

isHex('0xlol', { strict: true })
// false

isHex('lol', { strict: false })
// false