javascript async function test_save_kv(){ let k,v,r; k="ccc" v=[1,2,3] r=await localforage.setItem(k,v) r=await localforage.getItem(k) r=await localforage.removeItem(k) r=await localforage.key(0) //'ccc' r=await localforage.keys() r=await localforage.iterate(console.log) r=await localforage.length() r=await localforage.clear() }