Longest Common Prefix in Typescript

function longestCommonPrefix(strs: string[]): string {
    if (strs.length === 0) return "";

    let prefix = strs[0];

    for (let i = 1; i < strs.length; i++) {
        while (strs[i].search(prefix) !== 0) {
            prefix = prefix.substr(0, prefix.length - 1);
            if (prefix.length === 0) return "";
        }
    }

    return prefix;
};