camel case first javascript

1const country = 'united kingdom'
2
3const countryArr = country.split(' ')
4const newcountry = countryArr
5	.map((val) => {
6		const pattern = new RegExp(`^[${val}]`, 'i')
7		return val.replace(pattern, `${val.charAt(0).toUpperCase()}`)
8	})
9	.join(' ')
10	.trim()
11
12console.log(newcountry)
13