Function isEmpty

chavy.box.js:1084–1084

(bak)

  let oldbaks = $.getdata($.KEY_globalBaks)
  let newbaks = $.getjson($.KEY_backups, [])
  const isEmpty = (bak) => [undefined, null, ''].includes(bak)
  const isExistsInNew = (backupId) => newbaks.find((bak) => bak.id === backupId)

  // 存在旧备份数据时, 升级备份数据格式