Mastering the Art of Mocking DOM Methods with Jest

What is the best way to simulate this code snippet using Jest :

useEffect(() => {
        document
            .getElementById('firstname')
            ?.querySelector('input-field')
            ?.setAttribute('type', 'password')
    }, [])

Answer №1

Don't forget to include an empty array dependency inside your useEffect hook in case you've overlooked it. This will ensure that the useEffect code only re-renders every time the state changes. For example:

useEffect(() => {

}, [])

//Ensures that the code is called only once when the component is first rendered

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