cookie的设置与取值

设置cookie

function cookie(key, value, options) {
  let days
  let time
  let result

  // A key and value were given. Set cookie.
  if (arguments.length > 1 && String(value) !== '[object Object]') {
    // Enforce object
    options = Object.assign({}, options)
    if (value === null || value === undefined) {
      options.expires = -1
    }
    if (typeof options.expires === 'number') {
      days = options.expires * 24 * 60 * 60 * 1000
      time = options.expires = new Date()
      time.setTime(time.getTime() + days)
    }
    value = String(value)

return (document.cookie = `${encodeURIComponent(key)}=${
  options.raw ? value : encodeURIComponent(value)
}
${options.expires ? `; expires=${options.expires.toUTCString()}` : ''}
${options.path ? `; path=${options.path}` : ''}
${options.domain ? `; domain='${options.domain}` : ''}
${options.secure ? '; secure' : ''}`)
  }

  // Key and possibly options given, get cookie
  options = value || {}
  const decode = options.raw
    ? function(s) {
        return s
      }
    : decodeURIComponent
  return (result = new RegExp(`(?:^|; )${encodeURIComponent(key)}=([^;]*)`).exec(document.cookie))
    ? decode(result[1])
    : null
}

/** * getCookie 获取cookies * @param {String} key * @param {String} defultValue */

function getCookie() {
  const args = Array.prototype.slice.call(arguments)
  const key = args.length > 0 ? args[0] : null
  const defaultValue = args.length > 1 ? args[1] : ''
  // const cookieValue =cookie(key)
  let result = new RegExp(`(?:^|; )${encodeURIComponent(key)}=([^;]*)`).exec(document.cookie)
  result = result ? result[1] : null
  try {
    return result === null ? defaultValue : result
  } catch (error) {
    throw error
  }
}