[Vuejs]-Problem with data persistence in localstorage

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Your values start again at zero because you constantly start from your this.diaAnterior variable which, at each reload, becomes an empty array. So, you find yourself push your new value into an empty array each time you reload.

You have to get the value of your localStorage, store it in this.diaAnterior and then push your result to add a new value to the old ones.

In code it would look like this:


   guardarDiaAnterior() {
       const resultStorage = JSON.parse(localStorage.getItem('resultado'))
       if (resultStorage){
           this.diaAnterior = resultStorage
       }
       this.diaAnterior.push(this.resultado)
       localStorage.setItem('resultado',JSON.stringify(this.diaAnterior))
       this.ayer= JSON.parse(localStorage.getItem('resultado'))
   },
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