Nuxt•4mo ago

How to check if a composable exists ?

I want to check if a composable exists in a component. With import { myComposable } from '#imports', importing the composable throw an error and break nuxt if the composable doesn't exist.

6 Replies

Dragofafmir•4mo ago

Did you try to try catch an const { myComposable } = await import('./path/to/myComposable'), try to use it or catch it ? Something like this

<script setup lang="ts">
const composableLoaded = ref(false)

const loadMyComposable = async () => {
  try {
    const { myComposable } = await import('./path/to/myComposable')
    myComposable()
    composableLoaded.value = true
  } catch (error) {
    console.error("...", error)
    composableLoaded.value = false
  }
}

onMounted(() => {
  loadMyComposable()
})
</script>

<script setup lang="ts">
const composableLoaded = ref(false)

const loadMyComposable = async () => {
  try {
    const { myComposable } = await import('./path/to/myComposable')
    myComposable()
    composableLoaded.value = true
  } catch (error) {
    console.error("...", error)
    composableLoaded.value = false
  }
}

onMounted(() => {
  loadMyComposable()
})
</script>

ManUtopiK•2mo ago

I reply a long time ago. First, thank you for your response. It looks fine but can serve my purpose. In fact, I use nuxt layers. I want to check in a component of a layer if the composable exists. So, I can't rely on path/to/myComposable because the composable is outside the package. Using const { myComposable } = await import('#imports') break nuxt build if the composable doesn't exist. Any other idea to do that ?

handshake•2mo ago

I'm just curious, but in what situation would this happen? If you're expecting to use a composable, didn't you create it already?

ManUtopiK•2mo ago

I have a layer with some components shared between two apps. I want the behaviour of the components to be different on one app and use a composable if it presents. Another use case I have for this. I want to release a library and make it open source. This library contains several components with some text and I want to provide translation with i18n. How to check in my components if i18n composable is here and translate text ? Or provide default EN text if there's no i18n composable ? Of course, I don't want to ship i18n in my library.

Orbis•2mo ago

@ManUtopiK you can maybe use a Provider component to wrap your App and provide and inject your config

ManUtopiK•2mo ago

Ah yes. Thanks for your tip. I will take a try...

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How to check if a composable exists ?