trim from right in javascript code example

Example 1: javascript remove space from string

const removeSpaces = str => str.replace(/\s/g, '');

// Example
removeSpaces('hel lo wor ld');      // 'helloworld'

Example 2: javascript right trim

function rtrim(str, ch)
{
    for (i = str.length - 1; i >= 0; i--)
    {
        if (ch != str.charAt(i))
        {
            str = str.substring(0, i + 1);
            break;
        }
    } 
    return str;
}