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Vue 3 - implementing updating child component state from parent using provide/inject

๐Ÿ‘€ Views: 370 ๐Ÿ’ฌ Answers: 1 ๐Ÿ“… Created: 2025-08-21
vue.js vue-3 provide-inject JavaScript

I'm maintaining legacy code that After trying multiple solutions online, I still can't figure this out. Quick question that's been bugging me - I'm currently working with a scenario in my Vue 3 application where I'm trying to update the state of a child component from the parent using the provide/inject pattern..... The scenario arises when I update the injected value in the parent component; the child component does not reflect these changes even though I'm utilizing reactive properties. Here's a simplified version of what I have: In the parent component, I define the state and provide it: ```javascript <template> <div> <h1>Parent Component</h1> <button @click="updateValue">Change Value</button> <child-component /> </div> </template> <script setup> import { ref, provide } from 'vue'; import ChildComponent from './ChildComponent.vue'; const sharedValue = ref('Initial Value'); provide('sharedValue', sharedValue); function updateValue() { sharedValue.value = 'Updated Value'; } </script> ``` In the child component, I inject the value: ```javascript <template> <div> <h2>Child Component</h2> <p>Injected Value: {{ injectedValue }}</p> </div> </template> <script setup> import { inject } from 'vue'; const injectedValue = inject('sharedValue'); </script> ``` When I click the button in the parent component, I expect the text in the child component to update accordingly. However, it remains as 'Initial Value'. I checked the console for any warnings or errors, but thereโ€™s nothing unusual. I tried to debug this by logging the `sharedValue` in both components, and it shows the correct value in the parent but does not update in the child. I also ensured that the `sharedValue` is reactive by wrapping it in `ref`, but it still doesnโ€™t work. Has anyone encountered a similar scenario with the provide/inject API in Vue 3? Is there something I might be missing regarding reactivity or the lifecycle of these components? My development environment is Windows. Am I missing something obvious? For context: I'm using Javascript on Ubuntu. Am I missing something obvious? Has anyone dealt with something similar? I'm working on a mobile app that needs to handle this. Any advice would be much appreciated.