VUE.JS 緩存 good-storage ：
good-storage 是一個插件，需要安裝
localStorage 臨時緩存（關閉瀏覽器自動銷毀）
sessionStorage 長期緩存（主動清楚緩存才會銷毀）
安裝步驟：
在命令行安裝
npm install good-storage
使用：
1 import storage from 'good-storage' 2 3 // localStorage 4 storage.set(key,val) 5 6 storage.get(key, def) 7 8 // sessionStorage 9 storage.session.set(key, val) 10 11 storage.session.get(key, val) 12 緩存的API 13 14 set(key, val) 15 set storage with key and val 16 17 get(key, def) 18 get storage with key, return def if not find 19 20 remove(key) 21 remove storage with key 22 23 has(key) 24 determine storage has the key 25 26 clear() 27 clear all storages 28 29 getAll() 30 get all the storages 31 32 forEach(callback) 33 forEach the storages and call the callback function with each storage