Window Resize Observable     

QWindowResizeObservable is a Quasar component that emits a resize event whenever the document viewport (window) changes its size, with no polling involved.

Basic Usage

<template>
...
<!--can be placed anywhere within your template -->
<q-window-resize-observable @resize="onResize" />
...
</template>

<script>
export default {
...,
methods: {
...,
onResize (size) {
console.log(size)
// {
// width: 1200 // width of viewport (in px)
// height: 920 // height of viewport (in px)
// }
}
}
}
</script>

Please note that QWindowResizeObservable will issue an event as soon as it gets rendered and attached to DOM, so you can have the initial size of the window.