Array of notifications in Vue framework

I am facing an issue with returning an array of notifications from my backend. I have a simple wizard form that displays success messages using Toastification. Here is how it looks:

this.$toast({
                            component: ToastificationContent,
                            props: {
                                title: 'Product Added',
                                icon: 'PlusIcon',
                                variant: 'success',
                            },
                        })

This works perfectly fine for success messages. However, I encounter a problem when trying to display an array of error messages. The errors returned by my backend look like this:

{
    "response": false,
    "message": [
        "The sku has already been taken.",
        "The slug has already been taken."
    ]
}

I need to extract these messages and show them to the client. I attempted the following approach:

.catch(error => {
                        console.log(error.response.data.message)

                        error.response.data.message.map(function(value, key) {
                             this.$toast({
                                component: ToastificationContent,
                                props: {
                                    title: 'Something bad happened',
                                    text: 'Here should be the message from the array. How can I retrieve it?',
                                    icon: 'XIcon',
                                    variant: 'danger',
                                },
                        })
                        });
                    });

However, whenever I try to use this method, it shows an error:

TypeError: Cannot read property '$toast' of undefined

Do you have any suggestions on how to solve this issue?

Answer №1

When writing a callback function, it's important to consider the context of 'this'. To maintain the context, you can use an arrow function ()=>:

 error.response.data.message.map((value, key)=> {
   ...

instead of

 error.response.data.message.map(function(value, key) {
  ...

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