locutus/esm/ruby/String/chomp.js

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

export function chomp(str, separator) {
    // parity verified: Ruby 3.3
    //      discuss at: https://locutus.io/ruby/String/chomp/
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //          note 1: Returns a new string with the given record separator removed from the end.
    //          note 1: If separator is not specified, removes trailing newlines (\n, \r, or \r\n).
    //       example 1: chomp("hello\n")
    //       returns 1: 'hello'
    //       example 2: chomp("hello\r\n")
    //       returns 2: 'hello'
    //       example 3: chomp('hello', 'llo')
    //       returns 3: 'he'
    str = str + '';
    if (separator === undefined) {
        // Default: remove trailing \r\n, \n, or \r
        return str.replace(/(\r\n|\r|\n)$/, '');
    }
    separator = separator + '';
    if (str.endsWith(separator)) {
        return str.slice(0, -separator.length);
    }
    return str;
}