Starting a Vue.js app with preloaded data

Question

Starting a Vue.js app with preloaded data

I have a single file component named Foo:

<template>
<div>
  This is the main app. X is {{ x }}, y is {{ y }}
</div>
</template>
<script>
export default {
  data() {
   return { x: 'hello x' };
  },
}
</script>

My initialization process for the app looks like this:

// Here 'node' represents a DOM node,
// and 'y' is initialized.
import Vue from 'vue';
import Foo from './Foo.vue';
const app = new Vue({             
  'el': node,                     
  data: {y},
  render: h => h(Foo)             
});

This explanation oversimplifies the fact that 'y' is actually an object rather than just a simple string. It's an important detail to note.

I understand how to pass props to child components, but I am having trouble figuring out how to get the main configuration data into the top-level Vue app!

javascript vue.js vuejs2

Answer 1

Answer №1

Foo.vue :

Include props:['y']

<template>
<div>
  Welcome to the app. X is {{ x }}, and y is {{ y }}
</div>
</template>
<script>
  export default {
  props:['y']
    data() {
      return {
        x: 'hello x'
      };
    },
  }
</script>

main.js

Add template:'<Foo :y="y"'/> to the Vue instance, ensuring that 'node' is a valid HTML element

// At this point, 'node' should be assigned a DOM node,
// while 'y' is initialized with some content.
import Vue from 'vue';
import Foo from './Foo.vue';
const app = new Vue({
  'el': node,
  data: {
    y: "some content"
  },
  template: "<Foo :y='y'/>"
});

Answer 2

Foo.vue :

Include props:['y']

<template>
<div>
  Welcome to the app. X is {{ x }}, and y is {{ y }}
</div>
</template>
<script>
  export default {
  props:['y']
    data() {
      return {
        x: 'hello x'
      };
    },
  }
</script>

main.js

Add template:'<Foo :y="y"'/> to the Vue instance, ensuring that 'node' is a valid HTML element

// At this point, 'node' should be assigned a DOM node,
// while 'y' is initialized with some content.
import Vue from 'vue';
import Foo from './Foo.vue';
const app = new Vue({
  'el': node,
  data: {
    y: "some content"
  },
  template: "<Foo :y='y'/>"
});

Answer 3

Answer №2

Here is my solution.

To implement this functionality, you can follow these steps in your code file Foo.vue:

<template>
<div>
  This is the app. X is {{ x }}, y is {{ y }}
</div>
</template>
<script>
export default {
  data() {return { x: 'hello x' };},
  props: [ 'y' ],
}
</script>

Then, in the main JavaScript file that creates the application:

// Here, 'node' is set to a DOM node,
// and 'y' is defined.
import Vue from 'vue';
import Foo from './Foo.vue';
const app = new Vue({             
  'el': node,
  render: h => h(Foo, {props: {y})
});

With this approach, 'y' is passed as a prop without needing to use the heavy compiler-included Vue build required by using template.

The benefit of this method is that my content management system can easily generate different Vue apps with varying configurations for each section of a page.

While most documentation focuses on creating single-page applications with monolithic components, this setup serves my needs better.

Answer 4

Here is my solution.

To implement this functionality, you can follow these steps in your code file Foo.vue:

<template>
<div>
  This is the app. X is {{ x }}, y is {{ y }}
</div>
</template>
<script>
export default {
  data() {return { x: 'hello x' };},
  props: [ 'y' ],
}
</script>

Then, in the main JavaScript file that creates the application:

// Here, 'node' is set to a DOM node,
// and 'y' is defined.
import Vue from 'vue';
import Foo from './Foo.vue';
const app = new Vue({             
  'el': node,
  render: h => h(Foo, {props: {y})
});

With this approach, 'y' is passed as a prop without needing to use the heavy compiler-included Vue build required by using template.

The benefit of this method is that my content management system can easily generate different Vue apps with varying configurations for each section of a page.

While most documentation focuses on creating single-page applications with monolithic components, this setup serves my needs better.

Answer 5

Answer №3

Exploring Solutions

In the scenario where you need to utilize data from the top level Vue app, there are methods that can be employed such as utilizing $parent or $root. By leveraging the $data property of the Vue instance, access to its data becomes feasible. The documentation offers valuable insights on Vue instances.

When using $parent, a Vue instance of one component's parent is obtained.

this.$parent.$data.y

On the other hand, employing $root enables access to the root Vue instance within the current component tree.

this.$root.$data.y

Consequently, the Foo.vue component structure would resemble:

<template>
  <div>This is the app. X is {{ x }}, y is {{ y }}</div>
</template>

<script>
export default {
  data: function() {
    return { x: "x" };
  },
  computed: {
    y: function() {
      return this.$parent.$data.y;
    }
  }
};
</script>

For a live demonstration, refer to the provided code here.

Further Considerations

Nevertheless, it is not considered a recommended approach. For transmitting data to a child component, utilization of props is advisable. Alternatively, if props are not preferred, integration of Vuex can establish a global data store for housing top level options.

Answer 6

Exploring Solutions

In the scenario where you need to utilize data from the top level Vue app, there are methods that can be employed such as utilizing $parent or $root. By leveraging the $data property of the Vue instance, access to its data becomes feasible. The documentation offers valuable insights on Vue instances.

When using $parent, a Vue instance of one component's parent is obtained.

this.$parent.$data.y

On the other hand, employing $root enables access to the root Vue instance within the current component tree.

this.$root.$data.y

Consequently, the Foo.vue component structure would resemble:

<template>
  <div>This is the app. X is {{ x }}, y is {{ y }}</div>
</template>

<script>
export default {
  data: function() {
    return { x: "x" };
  },
  computed: {
    y: function() {
      return this.$parent.$data.y;
    }
  }
};
</script>

For a live demonstration, refer to the provided code here.

Further Considerations

Nevertheless, it is not considered a recommended approach. For transmitting data to a child component, utilization of props is advisable. Alternatively, if props are not preferred, integration of Vuex can establish a global data store for housing top level options.

Starting a Vue.js app with preloaded data

Answer №1

Answer №2

Answer №3

Exploring Solutions

Further Considerations

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