What is the difference between reactive() and ref() in Vue

1. Handling Primitive Values:
- `ref()` can store both primitive values (e.g., strings, numbers, booleans, `null`, and `undefined`) and objects.
- `reactive()` only works with objects and cannot store primitive values directly. If you need to make a primitive value reactive, use `ref()`[1][3][4].

2. Accessing Reactive Data:
- `ref()` data is accessed through the `.value` property. For example, `numberRef.value` to access the primitive value from the ref.
- `reactive()` data is accessed directly without needing the `.value` property. For example, `objectReactive.count` to access a property of the reactive object[1][2][3].

3. Reassigning Data:
- `ref()` allows reassigning the value of the ref without losing reactivity. For example, `user.value = { name: 'Jim Halpert' }` in the example below.
- `reactive()` objects are immutable by default. If you reassign the entire object, the reactivity is lost. For example, `Object.assign(modified, original)` in the example below[3][5].

Here is an example of using `ref()` and `reactive()`:

javascript
<script setup>
  import { ref, reactive } from 'vue';

  // Using ref()
  const count = ref(0);
  console.log(count.value); // logs 0
  count.value = 1;
  console.log(count.value); // logs 1

  // Using reactive()
  const user = reactive({ name: 'Michael Scott' });
  console.log(user.name); // logs Michael Scott
  user.name = 'Jim Halpert';
  console.log(user.name); // logs Jim Halpert
</script>

In summary, `ref()` is more flexible and can handle primitive values, while `reactive()` is more suitable for objects and provides a more straightforward way of accessing reactive data.