We pass an empty dependencies array to useEffect, so that it is called only once in the component’s lifetime, and the resize event listener is only registered once – when the component first renders. In our example, the action is to add the event listener for the resize hook with the addEventListener() method. The useEffect hook is used to perform an action when a component first renders, and when one or more specified dependencies change. The first is a variable that stores the state, and the second is a function that updates the state when it is called. ![]() The useState hook returns an array of two values. We use the useState React hook to create a state variable that will update whenever the width of the window changes. ![]() The resize event is fired whenever the width or height of the window/document view changes. The innerWidth property returns the interior width of the window in pixels, including the width of the vertical scrollbar, if it is present. The text is updated with the width of the window when it is resized. ![]() Window.removeEventListener('resize', handleWindowResize) Window.addEventListener('resize', handleWindowResize) To get the size of the window, we can use the JavaScript's window.outerWidth and window.outerHeight events. Import from 'react' Ĭonst = useState(window.innerWidth) The onresize event in JavaScript generally occurs when the window has been resized.
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