https://leetcode.com/problems/longest-common-prefix/submissions/

longestCommonPrefix.js

/**
 * @param {string[]} strs
 * @return {string}
 */
var longestCommonPrefix = function(strs) {
    const length = strs.length;
    if (length == 0) {
        return '';
    } else if (length == 1) {
        return strs[0];
    }
    let prefix = '';
    let match = false;
    let stop = false;
    const maxLength = Math.max(...strs.map(str => str.length));
    for (let j = 0; j < maxLength; j++) {
        let character1 = strs[0][j];
        let count = 1;
        for (let i = 1; i < strs.length; i++) {
            if (character1 == strs[i][j]) {
                count++;
            } else {
                stop = true;
                break;
            }
        }
        if (stop == true) {
            break;
        }
        if (count == strs.length) {
            prefix += character1;
        }
    }
   
    return prefix;
};