Update the VueJS application by loading and replacing the existing JSON data with new information

Question

Update the VueJS application by loading and replacing the existing JSON data with new information

Is there a way to dynamically re-render the entire v-for loop and DOM after fetching and loading new JSON data to replace the current one? I want to be able to click on different options and have the products updated.

Vue.use(VueResource);    
var productsList = new Vue({
    el: '#vue',
    data: function () {
        return {
            products: []
        };
    },
    ready: function () {
        this.$http.get('data/data.json').then(function (response) {
            this.products = response.data;
        });
    },
    methods: {
        loadProducts: function (url) {
            this.$http.get(url).then(function (response) {
                this.products = response.data;
            });
        }
    }
});

javascript json vue.js

Answer 1

Answer №1

To automatically update your DOM, the code above is suitable. However, there are 2 errors to address and 1 important consideration to keep in mind.

In JavaScript, anonymous functions have different scopes. This means that using an anonymous function like function(response) can cause you to lose the scope of the Vue instance, as represented by this. To handle this situation, you can either utilize arrow functions if supported in your project, or save the value of this into another variable before entering the anonymous function.

Vue.use(VueResource);    
var productsList = new Vue({
el: '#vue',
data: function () {
    return {
        products: []
    };
},
ready: function () {
    var self=this;
    this.$http.get('data/data.json').then(function (response) {
        self.products = response.data;
    });
},
methods: {
    loadProducts: function (url) {
        var self=this;
        this.$http.get(url).then(function (response) {
            self.products = response.data;
        });
    }
}
});

If you encounter an error in the browser with undefined products while using this particular code, it indicates a problem that needs to be resolved.

Answer 2

To automatically update your DOM, the code above is suitable. However, there are 2 errors to address and 1 important consideration to keep in mind.

In JavaScript, anonymous functions have different scopes. This means that using an anonymous function like function(response) can cause you to lose the scope of the Vue instance, as represented by this. To handle this situation, you can either utilize arrow functions if supported in your project, or save the value of this into another variable before entering the anonymous function.

Vue.use(VueResource);    
var productsList = new Vue({
el: '#vue',
data: function () {
    return {
        products: []
    };
},
ready: function () {
    var self=this;
    this.$http.get('data/data.json').then(function (response) {
        self.products = response.data;
    });
},
methods: {
    loadProducts: function (url) {
        var self=this;
        this.$http.get(url).then(function (response) {
            self.products = response.data;
        });
    }
}
});

If you encounter an error in the browser with undefined products while using this particular code, it indicates a problem that needs to be resolved.

Answer 3

Answer №2

Upon updating the products data, the DOM will automatically reflect the latest data changes as Vue data is reactive. One issue in your code is potentially having the incorrect use of this within the this.$http block. Instead of using the traditional function() syntax, consider using an arrow function, which does not bind its own this, arguments, super, or new.target, like so:

Vue.use(VueResource);    
var productsList = new Vue({
    el: '#vue',
    data: function () {
        return {
            products: []
        };
    },
    ready: function () {
        this.$http.get('data/data.json').then((response) => {
            this.products = response.data;
        });
    },
    methods: {
        loadProducts: function (url) {
            this.$http.get(url).then( (response) => {
                this.products = response.data;
            });
        }
    }
});

Answer 4

Upon updating the products data, the DOM will automatically reflect the latest data changes as Vue data is reactive. One issue in your code is potentially having the incorrect use of this within the this.$http block. Instead of using the traditional function() syntax, consider using an arrow function, which does not bind its own this, arguments, super, or new.target, like so:

Vue.use(VueResource);    
var productsList = new Vue({
    el: '#vue',
    data: function () {
        return {
            products: []
        };
    },
    ready: function () {
        this.$http.get('data/data.json').then((response) => {
            this.products = response.data;
        });
    },
    methods: {
        loadProducts: function (url) {
            this.$http.get(url).then( (response) => {
                this.products = response.data;
            });
        }
    }
});

Update the VueJS application by loading and replacing the existing JSON data with new information

Answer №1

Answer №2

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