Can a VueJS watcher be used to monitor changes in the height of an element?
I'm currently working on improving the filters section of a search results page. However, I'm facing difficulty in detecting when the results change so that the filters can be updated accordingly.
One way to achieve this is by utilizing the ResizeObserver and incorporating it into your Vue component
function trackHeightChanges() {
const resizeObserver = new ResizeObserver(function() {
console.log("Size changed");
});
resizeObserver.observe(document.getElementById('yourId'));
}
function adjustHeight() {
var element = document.getElementById('yourId');
console.log('...loading data...')
setTimeout(function(){
element.style = "height: 200px";
}, 3000);
}
trackHeightChanges();
adjustHeight();#yourId {
background-color: beige;
height: 100px;
}<div id="yourId">After retrieving the search results data, you can access the height using $ref.yourElement.clientHeight. Utilize this information to incorporate the height into your data{} section and then implement a watcher. Take a look at this demo
const myVue = new Vue({
el: '#app',
data: {
heightValue: 0
},
methods: {
computeHeight() {
this.heightValue = this.$refs.app.clientHeight;
}
}
});
If you wish to monitor an element within a component, try utilizing an arrow function:
observeHeight() {
const resizeObserver = new ResizeObserver(() => {
console.log('Element size changed:', document.getElementById('elementId').clientHeight);
});
resizeObserver.observe(document.getElementById('elementId'));
}
<script setup>
const items = ref([
'Lorem ipsum dolor sit amet',
'Consectetur adipiscing elit',
'Sed do eiusmod tempor incididunt ut labore'
])
const itemReferences = ref([])
onMounted(() => {
alert(itemReferences.value[1].clientHeight)
})
</script>
<template>
<ul style="width: 50px">
<li v-for="item in items" ref="itemReferences">
{{ item }}
</li>
</ul>
</template>
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