Vue.js AJAX call inside Modal

You can try events

Add event listener in component:

Vue.component('card-details', {
        template: '<div class="modal-body">@{{message}}</div>',
        // data is technically a function, so Vue won't
        // complain, but we return the same object
        // reference for each component instance
        props: ['cardid'],

        data: {
            message: ''
        },

        mounted() {
            this.$parent.$on("card-details:message", message => {
                this.message = message;
            });
        },
    }),

add emit line in function:

    getCCDetails: function (id) {
        console.log(id)
        console.log('calling function')
        axios.get('/card/'.concat(id))
            .then(function (response) {
                this.message = JSON.stringify(response.data)
                this.$emit('card-details:message', this.message) // <--
            }.bind(this))
            .catch(function (error) {
                return this.message = 'Sorry there was an error'
            }.bind(this));

    }

And make getCCDetails function call only on View Details button click.