vue deep watch

Certainly! deep watchers in Vue.js are used to watch for nested properties within an object. Here's an example along with explanations for each step:

// Vue component
export default {
  data() {
    return {
      user: {
        name: 'Alice',
        details: {
          age: 25,
          email: '[email protected]'
        }
      }
    };
  },
  watch: {
    'user.name': {
      handler(newName, oldName) {
        console.log(`Name changed from ${oldName} to ${newName}`);
      },
      deep: true
    },
    'user.details': {
      handler(newDetails, oldDetails) {
        console.log('User details changed:', newDetails);
      },
      deep: true
    }
  }
};

1. Data Initialization: Initialize a Vue component with a user object containing name and details properties.

2. Watchers Definition: Define watchers using the watch property of the component. Two watchers are created:

a. 'user.name': Watches changes in the name property of the user object.

b. 'user.details': Watches changes in the details property of the user object.

1. Watcher Handlers: Define the handling logic for when changes are detected in the watched properties:

a. handler function for 'user.name': Logs a message when the name property changes, displaying the old and new names.

b. handler function for 'user.details': Logs the new details object when it changes.

1. deep Option: Set deep: true for both watchers to enable deep watching. This allows watching nested properties within the objects (name and details).

These watchers will monitor changes in the specified properties (user.name and user.details) and trigger their respective handler functions when these properties change. The deep option allows the watchers to detect changes within nested objects or properties.