Make text L337'er!

leet.js

const leet = char => {
    const charMap = {
        'A': 4,
        'E': 3,
        'I': 1,
        'S': 5,
        'T': 7,
    }

    char = char.toString().toUpperCase()

    return charMap[char] || char
}

const leetText = text => [...text].map(leet).join('')

export default leetText

// console.log(leetText(`intelligence is the ability to adapt to changes.`))