CODEWITHSUNDEEP
javascriptvuejs3
Riza Khan
Riza Khan

Reputation: 3158

Vue3 Reactive value is not updating as expected

I have this .ts file:

import { reactive, toRefs } from 'vue'

export const TitleComponent = () => {
  const obj = reactive({
    title: "This should be reactive"
  }) 

  const updateObj = () => {
    obj.title = 'This is now different'
  }
  return {...toRefs(obj), updateObj }

}

I then import is into a vue component which DISPLAYS it

<template>
  <h1>{{ title }}</h1>
</template>
import { defineComponent } from 'vue'
import { TitleComponent } from 'some/place'

export default defineComponent({
  const { title } = TitleComponent()
  return { title }
})

Then, I use the function updateObj in another component that runs that method. But it doesn't update the title value. What gives?

<template>
  <button @click="updateObj">Click Me</button>
</template>

import { defineComponent } from 'vue'
import { TitleComponent } from 'some/place'

export default defineComponent({
  const { updateObj } = TitleComponent()
  return { updateObj}
})

Upvotes: 2

Views: 569

Answers (1)

rits
rits

Reputation: 1544

Move obj outside of export const TitleComponent = () => {}.

import { reactive, toRefs } from 'vue';

const obj = reactive({
  title: 'This should be reactive'
});

export const TitleComponent = () => {
  const updateObj = () => {
    obj.title = 'This is now different'
  };

  return { ...toRefs(obj), updateObj };
}

When its inside and you import/call TitleComponent() it creates a new instance of obj every time.

Upvotes: 5

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