Updates to object properties are not appearing in Vue component

Question

Updates to object properties are not appearing in Vue component

I am facing an issue with a Vue component that has a single prop, which is an object. Despite changing a property in this object, it does not reflect the update in the Vue template.

Below is a simplified version of the component:

<template>
  <p>{{ item.quantity }}</p>
</template>

<script>
  export default {
    props: {
      item: {
        required: true,
        type: Object
      }
    }
  }
</script>

Upon using vue-devtools in Google Chrome, I can observe that the quantity property in my item object is indeed getting updated. However, the template continues to render the default value (1).

Do I need to take any additional steps for Vue to watch nested properties or something similar?

javascript vue.js vuejs2

Answer 1

Answer №1

The problem lies in the fact that the component is not programmed to automatically re-render when there are changes in the props. One possible solution is to create a computed property that accesses the prop value and then use this computed property value in your template.

<template>
  <p>{{ quantity }}</p>
</template>

<script>
  export default {
    props: {
      item: {
        required: true,
        type: Object
      }
    },

    computed: {
        quantity: function() {
            return this.item.quantity;
        }
    }
  }
</script>

Answer 2

The problem lies in the fact that the component is not programmed to automatically re-render when there are changes in the props. One possible solution is to create a computed property that accesses the prop value and then use this computed property value in your template.

<template>
  <p>{{ quantity }}</p>
</template>

<script>
  export default {
    props: {
      item: {
        required: true,
        type: Object
      }
    },

    computed: {
        quantity: function() {
            return this.item.quantity;
        }
    }
  }
</script>

Updates to object properties are not appearing in Vue component

Answer №1

Similar questions

Troubleshooting issue with Express.json() functionality in the latest release of version 4.17

When utilizing the getIntersectionList function, IE 9 may experience a malfunction and cease functioning

Error thrown: Upon attempting to reopen the modalbox after closing it, an uncaught TypeError is encountered, indicating that the function $(...).load

The font size varies depending on the language being used

Every time I try to loop through my JSON object using an $.each statement, an error is thrown

Tips for Keeping a Responsive Image at the Forefront of a Text-Image Layout as You Scroll

unable to implement multiple layouts while utilizing react-router

Having trouble converting data back to JSON format after using JSON.parse in an ejs file with node and express

Does using the useState() hook in React automatically empty out the input fields?

Create data according to jQuery's AJAX data method

Tips for executing Cross-Origin-Requests from Firebase Hosting to an AWS Lambda function

Mastering socket emission and disconnection in reactjs

What is the process for moving information between files?

React Native can trigger a press event, as long as it is not within

Add a plethora of images to the canvas

Is it feasible to send props to { children } within a React functional component?

Reformat a JSON file and save as a new file

What is the best way to incorporate both images and text in PHP code?

Splitting the express instance and routes into two separate server files

Bootstrap typehead not activating jQuery AJAX request