Function uid

lib/web/polyfill.js:379–381

(key)

  } : simpleSet;
}
function uid(key){
  return SYMBOL + '(' + key + ')_' + (++sid + random())[TO_STRING](36);
}
function getWellKnownSymbol(name, setter){
  return (Symbol && Symbol[name]) || (setter ? Symbol : safeSymbol)(SYMBOL + DOT + name);
}