# `` Use it for responsive design, renders only the first child that matches query against the current window width. ## Usage ```jsx import {WindowWidthQuery} from 'libreact/lib/WindowWidthQuery'; import {View} from 'libreact/lib/View'; Up to 300px More than 300px ``` `` is simply a shortcut for ```jsx {({width}) => {/* Your queries here... */} } ```