substringUntilSpace.js

/** Substring of a given string until the first space occuring before the given max length. **/
function substringUntilSpace(start, length, s) {
    let trimmedString;
    if (s.length > length) {
        trimmedString = s.substr(start, length);
        if (s.charAt((start + length)) != ' ') {
            const lispace = trimmedString.lastIndexOf(" ");
            if (lispace != -1) trimmedString = trimmedString.substr(start, lispace);
        }
    } else trimmedString = s;
    return trimmedString;
}