Use this for attributes in mapstate

computed Use in mapState, To make properties available this, You need to use regular functions

     /** * mapState Objects form （ Alias ） +  Namespace is turned on （namespaced: true） *  You need to bring the module name to access the corresponding module state, For example, the following 'common' Module name  * **/
    ...mapState('common', {
    
      vuexCount: 'count',
      //  In order to be able to use  `this`  Get local state , You have to use regular functions 
      countPlusLocalState (state) {
    
        return state.count + this.temp
      }
    }),