locutus/esm/ruby/String/chop.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

export function chop(str) {
    // parity verified: Ruby 3.3
    //      discuss at: https://locutus.io/ruby/String/chop/
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //          note 1: Returns a new string with the last character removed.
    //          note 1: If the string ends with \r\n, both characters are removed.
    //       example 1: chop('string')
    //       returns 1: 'strin'
    //       example 2: chop("string\r\n")
    //       returns 2: 'string'
    //       example 3: chop('')
    //       returns 3: ''
    str = str + '';
    if (str.length === 0) {
        return str;
    }
    if (str.slice(-2) === '\r\n') {
        return str.slice(0, -2);
    }
    return str.slice(0, -1);
}