Get element height with Vuejs

When you need to get the height of an element in Vue.js, you can typically achieve this through several methods, including using the ref attribute and directly manipulating the DOM. Below, I will detail the process and provide a specific example.

Getting Element Height Using ref

Step 1: Add a ref Attribute to the Element

First, you need to add a ref attribute to the element you want to measure. For example, if you want to get the height of a div, you can do the following:

html
<template>
  <div ref="myElement">
    Some content here...
  </div>
</template>

Here, ref="myElement" is a reference identifier that you will use to access this div.

Step 2: Access the Element and Get Its Height in the Component

Within the Vue component's lifecycle hooks, such as the mounted hook, you can access this div via this.$refs.myElement and retrieve its height.

javascript
<script>
export default {
  mounted() {
    this.$nextTick(() => {
      const elementHeight = this.$refs.myElement.clientHeight;
      console.log('Element height is:', elementHeight);
    });
  }
}
</script>

Here, we use this.$nextTick to ensure the DOM updates are complete before reading the height, guaranteeing accurate results.

Example

Here is a complete Vue component example demonstrating how to get the height of an element:

vue
<template>
  <div ref="myElement" style="height: 200px;">
    My height is 200px; you can retrieve this value using Vue's `ref`.
  </div>
</template>

<script>
export default {
  mounted() {
    this.$nextTick(() => {
      const elementHeight = this.$refs.myElement.clientHeight;
      console.log('Element height is:', elementHeight);
    });
  }
}
</script>

Important Notes

• Ensure you retrieve the element's dimensions after the DOM has fully rendered, typically using the $nextTick method within the mounted hook.
• Keep component access and operations concise and efficient to avoid unnecessary re-renders or DOM manipulations.

By following these steps, you can easily retrieve the height of any element within a Vue.js application and perform the necessary operations or style adjustments as needed.