code test array return longest string javascript code example

Example 1: find length of longest string in array javascript

const findLongest = words => Math.max(...(words.map(el => el.length)));

// Example
findLongest(['always','look','on','the','bright','side','of','life']);  // 6

Example 2: javascript find the longest string in array

Math.max(...(x.map(el => el.length)));