CODEWITHSUNDEEP
javascriptvue.js
Steve
Steve

Reputation: 645

Passing data to child component also changes parent data

Passing data from parent to child is a piece of cake and never had a problem that when you update the child prop data also updates the parent data at the same time, although now i want to avoid that.

I have this child component inside the parent component

    <address-dialog v-if="dialog.address.status" :countries="countries" :address-data="dialog.address.data" 
:open="dialog.address.status" @close="dialog.address.status = !dialog.address.status"></address-dialog>

Inside the child component i pass the props as is and then set them with the data method.

props: {
    open: {
        type: Boolean,
        default: false
    },
    addressData: {
        type: Object,
        default: null
    },
    countries: {
        type: Array,
        default: null
    }
},

data() {
    return {
        mdiClose,
        loading: false,
        valid: false,
        dialog: this.open,
        address: this.addressData,
        cities: [],
        states: [],
        overlay: false,
        snackbar: {
            status: false, 
            text: '',
            color: '#FF5252'
        },
        rules: {
            required: value => !!value || 'Required.',
        },
    }
},

When updating address inside the child component it also automatically updates the address in the parent component, how can i avoid that?

Upvotes: 2

Views: 277

Answers (1)

Mina
Mina

Reputation: 17594

Because they have the same reference ( as the address is an object ).

One solution is to pass a new object that has the addressData properties by spread operator.

address: { ...this.addressData }

Upvotes: 2

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