longest-common-prefix.js

/**
 * @param {string[]} strs
 * @return {string}
 */
var longestCommonPrefix = function (strs) {
  if (!strs[0].length) {
    return "";
  }

  const first = strs[0];

  for (let i = 0; i <= first.length; i++) {
    for (let j = 1; j < strs.length; j++) {
      if (first[i] !== strs[j][i]) {
        return first.slice(0, i);
      }
    }
  }
};