Add custom property to vuejs component

Question

How do I set a custom property inside a vue component?

var myComponent = Vue.extend({
    data: function() {
        return {
            item: {}
        }
    },

    created: function() {
        // This does not seem to work
        this.item.customProperty = 'customProperty';
    }
});

Answer 1

You can use Vue.set to add reactivity:

var myComponent = Vue.extend({
    data: function() {
        return {
            item: {}
        }
    },

    created: function() {
        Vue.set(this.item, 'customProperty', 'customProperty');
    }
});

Answer 2

It seems that you should use Object.assign:

var myComponent = Vue.extend({
    data: function() {
        return {
            item: {}
        }
    },

    created: function() {
        // This does not seem to work
        this.item = Object.assign(this.item, {customProperty:'customProperty'});
    }
});