Modifying multiple objects with Vue's V-Model

When utilizing the mounted function in Vue to assign two different objects in the data area and bind one of them to a form, an unusual issue arises: Both objects change when input values are entered in the form

For example:

<template>
    <v-card>
        <v-form>

        <v-text-field
        v-model="newProduct.name"
        ></v-text-field>

        <v-text-field
        v-model="newProduct.price.net"
        ></v-text-field>

        </v-form>
    </v-card>
  
</template>

<script>
export default {
    data() {
        return {
            originalProduct: {}
            newProduct:{}
        }            
    },
    mounted () {
        const productFromApi = {
            name: 'test'
            price: {
                net:20
            }
        }
        this.originalProduct = productFromApi
        this.newProduct = productFromApi
    }
}
</script>

In this scenario, the originalProduct also changes when the form is edited

By using Object.assign to assign the objects, only the nested object price changes with the bound object newProduct

I do not want the originalProduct to be altered

Is there a solution available for this issue?

Answer №1

If you desire complete isolation of changes, it's essential to create a deep copy of the object:

this.duplicateProduct = JSON.parse(JSON.stringify(originalProduct))

Answer №2

By assigning the clone of productFromApi to this.originalProduct, you ensure that any changes made to productFromApi do not affect the originalProduct or newProduct objects.

To achieve this, consider using object spread syntax:

   this.originalProduct = { ...productFromApi }

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