What is the process for accessing getBoundingClientRect within the Vue Composition API?

Question

What is the process for accessing getBoundingClientRect within the Vue Composition API?

While I understand that in Vue we can access template refs to use getBoundingClientRect() with the options API like this:

const rect = this.$refs.image.$el.getBoundingClientRect();

I am now attempting to achieve the same using template refs within the composition API in Vue as shown below:

const image = ref(null);
const rect = image.value.getBoundingClientRect();

This approach is functional, but it prompts an undesirable error message:

Object is possibly 'null'

I have also tried the following code, yet the error persists.

const rect = image?.value.getBoundingClientRect();

typescript vue.js vuejs3 vue-composition-api

Answer 1

Answer №1

Have you taken the time to review the documentation thoroughly?

Remember, accessing the ref is only possible after the component has been mounted.

Therefore, until the element is officially mounted, it will remain as null.
Check out the Vue SFC Playground for more insights.

Answer 2

Have you taken the time to review the documentation thoroughly?

Remember, accessing the ref is only possible after the component has been mounted.

Therefore, until the element is officially mounted, it will remain as null.
Check out the Vue SFC Playground for more insights.

Answer 3

Answer №2

To enhance your referenced element, specify a type and utilize the onMounted hook to exhibit the rectangle:

import { onMounted,ref } from 'vue'
...
const image = ref<HTMLImageElement|null>(null);
//
onMounted(()=>{
    const rect =image.value?.getBoundingClientRect()
    console.log('rect --------------- ', rect)
})

This method is applicable for Nuxt 3 as well

VIEW DEMO

Answer 4

To enhance your referenced element, specify a type and utilize the onMounted hook to exhibit the rectangle:

import { onMounted,ref } from 'vue'
...
const image = ref<HTMLImageElement|null>(null);
//
onMounted(()=>{
    const rect =image.value?.getBoundingClientRect()
    console.log('rect --------------- ', rect)
})

This method is applicable for Nuxt 3 as well

VIEW DEMO

What is the process for accessing getBoundingClientRect within the Vue Composition API?

Answer №1

Answer №2

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