Function base64clean

docs/app/js/sanddance-app.js:113963–113973

(str)

// ================
var INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g;
function base64clean(str) {
    // Node takes equal signs as end of the Base64 encoding
    str = str.split("=")[0];
    // Node strips out invalid characters like \n and \t from the string, base64-js does not
    str = str.trim().replace(INVALID_BASE64_RE, "");
    // Node converts strings with length < 2 to ''
    if (str.length < 2) return "";
    // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
    while(str.length % 4 !== 0)str = str + "=";
    return str;
}
function utf8ToBytes(string, units) {
    units = units || Infinity;
    var codePoint;