Is nextJS SSR the optimal solution for handling undefined variables in the window object to enable optional chaining in cases where global variables are not supported?

When using (window?.innerHeight || 420) for server-side rendering (SSR), the translation would be

(((_window = window) === null || _window === void 0 ? void 0 : _window.innerHeight) || 420)

However, this could result in a

referenceError: window is not defined

This issue stems from JavaScript's unique semantics where you must assign undefined if something is not defined, or use a complex expression like typeof window === 'undefined'

For frameworks like Next.js that do not support global variables, how can I globally define the necessary code snippet to enable window's optional chaining feature consistently?

javascriptnext.js

Answer №1

When operating SSR on the server, the window object will not be accessible until after the page has finished loading. To access the window object in React, you can utilize lifecycle methods such as useEffect or componentDidMount.

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