# How to dynamically render components in "vue-infinite-loading" using relative heights

When working with an infinite loading library like "vue-infinite-loading" or "vue-infinite-scroll", instead of hardcoding the amount of components to be rendered per page, we might use a technique to estimate the right number, based on the height of the browser window and the height of the component.
We need to obtain both of those heights and then divide them to obtain the number we are looking for. First, we can obtain the height of the browser window by using the following command:
```
window.innerHeight
```
After that, in order to obtain the height of the components rendered in the infinite scroll window, we may use:
```
this.$refs.yourComponentRefHere.clientHeight
```
"clientHeight" will return the height of the component and now, we can divide the numbers obtained to get the render number.
( Note: as a safety measure, the number we get should be larger than the obtained number, therefore we need to add a number to it to be sure it will behave as desired).
By using this technique we can change the render number in a responsive manner and can avoid unnecessary requests in order to give the user a more performant user experience.
Note: We can also dynamically adjust the render number if the window size changes, by adding a watcher and the following event listener:
```
window.addEventListener('resize',onResize)
```
Where "onResize" is the action to re-calculate the render number.
Mihai Barbu
08 Dec 2021

« Back to post