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

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