js存取cookie数据

设置cookie

//name 字段名   value 字段值   perpetual  有效期
setCookie(name,value,perpetual) {
    let exdate = new Date()
    exdate.setDate(exdate.getDate() + perpetual)  //exdate.setDate(exdate.getDate() + 365)
    document.cookie = name + '=' + value + ';expires=' + exdate.toGMTString()
    //永久有效
    //document.cookie = name + '=' + value + ';expires=' + 'Fri, 31 Dec 9999 23:59:59 GMT'    
},

获取cookie数据

//name 字段名   
getCookie (name) {
      if (document.cookie.length > 0) {
        var start = document.cookie.indexOf(name + '=')
        if (start !== -1) {
          start = start + name.length + 1
          let end = document.cookie.indexOf(';', start)
          if (end === -1) end = document.cookie.length
          return unescape(document.cookie.substring(start, end))
        }
      }
      return ''
    },