scopes in vuejs

 scopes are called as

how can we access properties and methods that we called as scope

component scope-> access method sor properties using methods and data

localscope-> in v-for  -> we get data using let inside of for loop

parent scope-> pasing properties from parent to child that called

In Vue.js, scopes are a way to define the visibility and accessibility of data and methods within a component. There are different types of scopes in Vue.js:

1. Component Scope: The default scope in Vue.js components is the component itself. Data, computed properties, methods, and lifecycle hooks defined within the component are accessible within the component's template.

2. Local Scope: Within a component's template, you can define local variables using the v-for directive or by using the let keyword. These variables are scoped to the specific iteration or block in which they are defined.

   Example:

 s

<template>
  <div>
    <ul>
      <li v-for="item in items" :key="item.id">
        {{ item.name }}
        <span v-if="item.quantity > 0">({{ item.quantity }})</span>
      </li>
    </ul>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [
        { id: 1, name: 'Item 1', quantity: 5 },
        { id: 2, name: 'Item 2', quantity: 3 },
        { id: 3, name: 'Item 3', quantity: 0 },
      ]
    };
  }
}
</script>

1. In the above example, the item variable is scoped within the v-for loop and is accessible only within each iteration of the loop.

2. Parent Scope: Vue.js components can have a parent-child relationship, where data can be passed from a parent component to a child component using props. The child component can access the passed data within its own scope.

   Example:

<template>
  <div>
    <child-component :message="parentMessage" />
  </div>
</template>

<script>
import ChildComponent from './ChildComponent.vue';

export default {
  components: {
    ChildComponent
  },
  data() {
    return {
      parentMessage: 'Hello from parent!'
    };
  }
}
</script>

1. In the above example, the parentMessage data property in the parent component is passed to the message prop of the child component. The child component can access and use the message prop within its own scope.

These are some of the common scopes in Vue.js that allow you to define and control the visibility and accessibility of data and methods within your components.