The process of sending JSON data to a Vue instance

Question

The process of sending JSON data to a Vue instance

I am facing an issue with my Vue instance where I need to pass JSON data from the backend without using HTTP requests because the data is constant.

I attempted to achieve this using props, but encountered some challenges... In the DOM, it appears as

<div id="my-component" prices="[object Object]">

The Vue debug tool shows the image as an empty string, and the console displays undefined

<div id="my-component" :prices="{{ $prices }}">
</div>

<script>
        new Vue({
            el: '#my-component',
            props: ['prices'],
            mounted: function() {
               console.log(this.image);
           },
       });
</script>

where $prices represents a json-encoded array.

javascript arrays json laravel vue.js

Answer 1

Answer №1

Your solution was on the right track, but instead of using a prop, it's better to utilize a data attribute and assign the JSON through a method:

new Vue({
    el: '#app',
    data: {
        json: {},
    },
    methods: {
        setJson (payload) {
            this.json = payload
        },
    }
})

<script src="https://unpkg.com/vue/dist/vue.js"></script>
<div id="app" :json="setJson({ foo: 'bar' })">
    <pre>{{ json }}</pre>
</div>

To pass your Laravel data to the setJson method, you can do the following:

:json="setJson({{ $prices }})

Answer 2

Your solution was on the right track, but instead of using a prop, it's better to utilize a data attribute and assign the JSON through a method:

new Vue({
    el: '#app',
    data: {
        json: {},
    },
    methods: {
        setJson (payload) {
            this.json = payload
        },
    }
})

<script src="https://unpkg.com/vue/dist/vue.js"></script>
<div id="app" :json="setJson({ foo: 'bar' })">
    <pre>{{ json }}</pre>
</div>

To pass your Laravel data to the setJson method, you can do the following:

:json="setJson({{ $prices }})

Answer 3

Answer №2

Is there a specific Laravel helper for this task? I am not aware of one, but I can provide a general solution.

One approach is to save your JSON data in a global variable when the page loads and then utilize it in your JavaScript files.

The basic idea is to create HTML code similar to this:

<script>
window.myApp = window.myApp || {};
window.myApp.userData = { "firstName": "Jane", "lastName": "Smith" };
</script>

Then, you can access the myApp.userData variable from JavaScript and use it when setting up the Vue component.

new Vue({
    el: '#app',
    data: {
        userData: myApp.userData
    }
});

Below is an example:

new Vue({
  el: '#app',
  data: {
    userData: myApp.userData
  }
});

<script>
  window.myApp = window.myApp || {};
  window.myApp.userData = { "firstName": "Jane", "lastName": "Smith" };
</script>


<div id="app">
  Hello {{userData.firstName}}
</div>

<script src="https://unpkg.com/vue/dist/vue.js"></script>

Answer 4

Is there a specific Laravel helper for this task? I am not aware of one, but I can provide a general solution.

One approach is to save your JSON data in a global variable when the page loads and then utilize it in your JavaScript files.

The basic idea is to create HTML code similar to this:

<script>
window.myApp = window.myApp || {};
window.myApp.userData = { "firstName": "Jane", "lastName": "Smith" };
</script>

Then, you can access the myApp.userData variable from JavaScript and use it when setting up the Vue component.

new Vue({
    el: '#app',
    data: {
        userData: myApp.userData
    }
});

Below is an example:

new Vue({
  el: '#app',
  data: {
    userData: myApp.userData
  }
});

<script>
  window.myApp = window.myApp || {};
  window.myApp.userData = { "firstName": "Jane", "lastName": "Smith" };
</script>


<div id="app">
  Hello {{userData.firstName}}
</div>

<script src="https://unpkg.com/vue/dist/vue.js"></script>

Answer 5

Answer №3

Initially, I upvoted the provided answer, but later realized that I needed to change my vote (unfortunately, I lack the necessary reputation to do so).

It is crucial not to set data in this manner, as it can lead to an error message such as:

[Vue warn]: You may have an infinite update loop in a component render function

If any components rely on data being set like this (through watching or rendering), it will result in an endless loop.

When utilizing this approach:

You are setting the data within the render function (in the template)
If something triggers a re-render, the data will be set again
Any component using this data will need to re-render, potentially causing a re-render of the main Vue instance

This sequence of events creates the infinite loop.

An explanation by LinusBorg can be found here.

Answer 6

Initially, I upvoted the provided answer, but later realized that I needed to change my vote (unfortunately, I lack the necessary reputation to do so).

It is crucial not to set data in this manner, as it can lead to an error message such as:

[Vue warn]: You may have an infinite update loop in a component render function

If any components rely on data being set like this (through watching or rendering), it will result in an endless loop.

When utilizing this approach:

You are setting the data within the render function (in the template)
If something triggers a re-render, the data will be set again
Any component using this data will need to re-render, potentially causing a re-render of the main Vue instance

This sequence of events creates the infinite loop.

An explanation by LinusBorg can be found here.

Answer 7

Answer №4

Although this post is dated, here is my approach (inspired by my experience with Symfony 4 + VueJS):

<div id="my-component" prices-data="{{ json($prices) }}">
</div>

<script>
        new Vue({
            el: '#my-component',
            props: ['pricesData'],
            data: {
               prices: null,
            },
            mounted: function() {
               this.prices = JSON.parse(this.pricesData);
           },
       });
</script>

This assumes that $prices is a blade variable.

Note: I utilized @json() when $prices can be encoded using json_encode() for simple objects (blade's underlying function). For complex objects, consider utilizing JMS Serializer with @MaxDepth annotations to handle complex structures.

Answer 8

Although this post is dated, here is my approach (inspired by my experience with Symfony 4 + VueJS):

<div id="my-component" prices-data="{{ json($prices) }}">
</div>

<script>
        new Vue({
            el: '#my-component',
            props: ['pricesData'],
            data: {
               prices: null,
            },
            mounted: function() {
               this.prices = JSON.parse(this.pricesData);
           },
       });
</script>

This assumes that $prices is a blade variable.

Note: I utilized @json() when $prices can be encoded using json_encode() for simple objects (blade's underlying function). For complex objects, consider utilizing JMS Serializer with @MaxDepth annotations to handle complex structures.

The process of sending JSON data to a Vue instance

Answer №1

Answer №2

Answer №3

Answer №4

Similar questions

Navigating an Array of Objects is not functioning properly within React

What steps can be taken to address an unusual conflict arising between a form post and an ajax post

Regain focus after selecting a date with Bootstrap datepicker

Can you suggest a simpler approach to implementing this function?

increasing the size of an array in react javascript

Creating a specific quantity of divs with JavaScript

Node.js is great at hosting HTML files, but struggles when it comes to loading script files within those pages

contrasting the application of logic in Rails controllers versus JavaScript within the .js.erb files

Having issues with deserializing boolean data types from a JSON file in Python

Is there a way to transform a tabulated tree into JSON using JavaScript?

Converting a Spark DataFrame to a JSON array

Looking to retrieve the checkbox value from HTML in AngularJS and pass it to the controller

"Enjoying the convenience of a stationary header while browsing on your smartphone

Having issues with texturing my glb model in three.js

The Johnny-Five stepper initiates movement within a for-loop

The task "gulp js src - duplication and implementation of base" involves duplicating

Searching for client using mqtt.js in Angular2 with Typescript yields no results

A guide on passing an array parameter using JavaScript

Error encountered in NextJS middleware: NetworkError occurred while trying to retrieve resource

The event is not triggered by ng-submit