how to use usestate in vue in javascript

In Vue, you can use the reactive() function to create a reactive object that you can use as your state management system. This function is similar to the useState() hook in React.

Here is how you can use reactive() to create a state management system in Vue:

index.tsx
import { reactive } from "vue";

// create a reactive object for the state
const state = reactive({
  count: 0,
});

// increment the count
function incrementCount() {
  state.count++;
}

// use the state in your template
<template>
  <div>
    <p>Count: {{ state.count }}</p>
    <button @click="incrementCount">Increment</button>
  </div>
</template>
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In this example, we use the reactive() function to create a reactive object called state with a count property initialized to 0. We then define a function called incrementCount() that increments the count property on each button click.

Finally, we use the state object in our template to display the current count and bind the incrementCount() function to a button click using the @click directive.

Note that you need to import the reactive() function from the vue package in order to use it.